{"id":68913,"date":"2024-07-11T06:20:23","date_gmt":"2024-07-11T02:50:23","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/"},"modified":"2024-07-11T06:20:23","modified_gmt":"2024-07-11T02:50:23","slug":"the-openclosed-principle-in-c-with-filters-and-specifications-3dd6","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/","title":{"rendered":"\u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 \u062f\u0631 \u0633\u06cc \u0634\u0627\u0631\u067e \u0628\u0627 \u0641\u06cc\u0644\u062a\u0631\u0647\u0627 \u0648 \u0645\u0634\u062e\u0635\u0627\u062a"},"content":{"rendered":"<p>Summarize this content to 400 words in Persian Lang<br \/>\n            \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u062f \u0645\u0627 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc\u060c \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0648\u06cc \u0628\u0627\u0642\u06cc \u0645\u06cc \u0645\u0627\u0646\u062f\u060c \u0627\u0633\u0627\u0633\u06cc \u0627\u0633\u062a.  \u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0648\u0644 \u06a9\u0644\u06cc\u062f\u06cc \u062f\u0631 \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u062c\u0627\u0645\u062f\u060c \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 (OCP) \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0627\u0635\u0644 \u0628\u06cc\u0627\u0646 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0646\u0631\u0645\u200c\u0627\u0641\u0632\u0627\u0631 \u0628\u0627\u06cc\u062f \u0628\u0631\u0627\u06cc \u062a\u0648\u0633\u0639\u0647 \u0628\u0627\u0632 \u0628\u0627\u0634\u0646\u062f \u0627\u0645\u0627 \u0628\u0631\u0627\u06cc \u0627\u0635\u0644\u0627\u062d \u0628\u0633\u062a\u0647 \u0634\u0648\u0646\u062f.  \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0628\u0647 \u0627\u06cc\u0646 \u0627\u0635\u0644 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0639\u0645\u0644\u06cc \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0645\u062d\u0635\u0648\u0644 \u067e\u0627\u06cc\u0628\u0646\u062f \u0628\u0627\u0634\u06cc\u0645.<\/p>\n<p>  \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0627\u0648\u0644\u06cc\u0647: \u0645\u0634\u06a9\u0644<\/p>\n<p>\u062a\u0635\u0648\u0631 \u06a9\u0646\u06cc\u062f \u0645\u0627 \u06cc\u06a9 \u06a9\u0627\u062a\u0627\u0644\u0648\u06af \u0645\u062d\u0635\u0648\u0644 \u0633\u0627\u062f\u0647 \u062f\u0627\u0631\u06cc\u0645 \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0647\u0631 \u0645\u062d\u0635\u0648\u0644 \u062f\u0627\u0631\u0627\u06cc \u0646\u0627\u0645\u060c \u0631\u0646\u06af \u0648 \u0627\u0646\u062f\u0627\u0632\u0647 \u0627\u0633\u062a.  \u0645\u0627 \u0628\u0647 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0627\u06cc\u0646 \u0645\u062d\u0635\u0648\u0644\u0627\u062a \u0628\u0631 \u0627\u0633\u0627\u0633 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u0645.  \u06cc\u06a9 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0633\u0627\u062f\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0647 \u0634\u06a9\u0644 \u0632\u06cc\u0631 \u0628\u0627\u0634\u062f:<\/p>\n<p>public enum Color<br \/>\n{<br \/>\n    Red, Green, Blue<br \/>\n}<\/p>\n<p>public enum Size<br \/>\n{<br \/>\n    Small, Medium, Large, Yuge<br \/>\n}<\/p>\n<p>public class Product<br \/>\n{<br \/>\n    public string Name;<br \/>\n    public Color Color;<br \/>\n    public Size Size;<\/p>\n<p>    public Product(string name, Color color, Size size)<br \/>\n    {<br \/>\n        Name = name ?? throw new ArgumentNullException(paramName: nameof(name));<br \/>\n        Color = color;<br \/>\n        Size = size;<br \/>\n    }<br \/>\n}<\/p>\n<p>public class ProductFilter<br \/>\n{<br \/>\n    public IEnumerableProduct&gt; FilterByColor(IEnumerableProduct&gt; products, Color color)<br \/>\n    {<br \/>\n        foreach (var p in products)<br \/>\n            if (p.Color == color)<br \/>\n                yield return p;<br \/>\n    }<\/p>\n<p>    public static IEnumerableProduct&gt; FilterBySize(IEnumerableProduct&gt; products, Size size)<br \/>\n    {<br \/>\n        foreach (var p in products)<br \/>\n            if (p.Size == size)<br \/>\n                yield return p;<br \/>\n    }<\/p>\n<p>    public static IEnumerableProduct&gt; FilterBySizeAndColor(IEnumerableProduct&gt; products, Size size, Color color)<br \/>\n    {<br \/>\n        foreach (var p in products)<br \/>\n            if (p.Size == size &amp;&amp; p.Color == color)<br \/>\n                yield return p;<br \/>\n    }<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>\u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 \u0627\u06cc\u0646 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0628\u0647 \u0631\u0627\u062d\u062a\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646 \u062f\u06cc\u062f \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u063a\u06cc\u0631\u0642\u0627\u0628\u0644 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0634\u0648\u062f.  \u0647\u0631 \u0645\u0639\u06cc\u0627\u0631 \u0641\u06cc\u0644\u062a\u0631 \u062c\u062f\u06cc\u062f \u06cc\u0627 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627 \u0646\u06cc\u0627\u0632 \u0628\u0647 \u0631\u0648\u0634 \u062c\u062f\u06cc\u062f\u06cc \u062f\u0627\u0631\u062f.  \u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 \u0631\u0627 \u0646\u0642\u0636 \u0645\u06cc\u200c\u06a9\u0646\u062f \u0632\u06cc\u0631\u0627 ProductFilter \u0647\u0631 \u0628\u0627\u0631 \u06a9\u0647 \u06cc\u06a9 \u0646\u06cc\u0627\u0632 \u0641\u06cc\u0644\u062a\u0631\u06cc\u0646\u06af \u062c\u062f\u06cc\u062f \u0645\u0639\u0631\u0641\u06cc \u0645\u06cc \u0634\u0648\u062f\u060c \u06a9\u0644\u0627\u0633 \u0628\u0627\u06cc\u062f \u0627\u0635\u0644\u0627\u062d \u0634\u0648\u062f.<\/p>\n<p>  Refactoring \u0628\u0627 OCP: \u0631\u0627\u0647 \u062d\u0644<\/p>\n<p>\u0628\u0631\u0627\u06cc \u067e\u0627\u06cc\u0628\u0646\u062f\u06cc \u0628\u0647 \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647\u060c \u0645\u0627 \u0628\u0647 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u06af\u0633\u062a\u0631\u0634 \u0639\u0645\u0644\u06a9\u0631\u062f \u0641\u06cc\u0644\u062a\u0631\u06cc\u0646\u06af \u062e\u0648\u062f \u0628\u062f\u0648\u0646 \u062a\u063a\u06cc\u06cc\u0631 \u06a9\u062f \u0645\u0648\u062c\u0648\u062f \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u0645.  \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u0644\u06af\u0648\u06cc Specification \u06a9\u0647 \u0628\u0647 \u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0645\u0639\u06cc\u0627\u0631\u0647\u0627 \u0631\u0627 \u0628\u0647 \u0631\u0648\u0634\u06cc \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0648 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0646\u06cc\u0645\u060c \u0628\u0647 \u0627\u06cc\u0646 \u0647\u062f\u0641 \u062f\u0633\u062a \u06cc\u0627\u0628\u06cc\u0645.<\/p>\n<p>  \u0645\u0631\u062d\u0644\u0647 1: \u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637<\/p>\n<p>\u0627\u0628\u062a\u062f\u0627 \u062f\u0648 \u0631\u0627\u0628\u0637 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u06cc\u0645: \u06cc\u06a9\u06cc \u0628\u0631\u0627\u06cc \u0645\u0634\u062e\u0635\u0627\u062a \u0648 \u062f\u06cc\u06af\u0631\u06cc \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631\u0647\u0627.<\/p>\n<p>public interface ISpecificationT&gt;<br \/>\n{<br \/>\n    bool IsSatisfied(T item);<br \/>\n}<\/p>\n<p>public interface IFilterT&gt;<br \/>\n{<br \/>\n    IEnumerableT&gt; Filter(IEnumerableT&gt; items, ISpecificationT&gt; spec);<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>  \u0645\u0631\u062d\u0644\u0647 2: \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0645\u0634\u062e\u0635\u0627\u062a<\/p>\n<p>\u062f\u0631 \u0645\u0631\u062d\u0644\u0647 \u0628\u0639\u062f\u060c \u0645\u0634\u062e\u0635\u0627\u062a \u0628\u062a\u0646 \u0631\u0627 \u0628\u0631\u0627\u06cc \u0631\u0646\u06af \u0648 \u0627\u0646\u062f\u0627\u0632\u0647 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u06cc\u0645.<\/p>\n<p>public class ColorSpecification : ISpecificationProduct&gt;<br \/>\n{<br \/>\n    private Color color;<\/p>\n<p>    public ColorSpecification(Color color)<br \/>\n    {<br \/>\n        this.color = color;<br \/>\n    }<\/p>\n<p>    public bool IsSatisfied(Product p)<br \/>\n    {<br \/>\n        return p.Color == color;<br \/>\n    }<br \/>\n}<\/p>\n<p>public class SizeSpecification : ISpecificationProduct&gt;<br \/>\n{<br \/>\n    private Size size;<\/p>\n<p>    public SizeSpecification(Size size)<br \/>\n    {<br \/>\n        this.size = size;<br \/>\n    }<\/p>\n<p>    public bool IsSatisfied(Product p)<br \/>\n    {<br \/>\n        return p.Size == size;<br \/>\n    }<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>  \u0645\u0631\u062d\u0644\u0647 3: \u0645\u0634\u062e\u0635\u0627\u062a \u0631\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u06a9\u0646\u06cc\u062f<\/p>\n<p>\u0645\u0627 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0645\u0634\u062e\u0635\u0627\u062a \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0628\u0631\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628 \u0686\u0646\u062f\u06cc\u0646 \u0645\u0639\u06cc\u0627\u0631 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645.<\/p>\n<p>public class AndSpecificationT&gt; : ISpecificationT&gt;<br \/>\n{<br \/>\n    private ISpecificationT&gt; first, second;<\/p>\n<p>    public AndSpecification(ISpecificationT&gt; first, ISpecificationT&gt; second)<br \/>\n    {<br \/>\n        this.first = first ?? throw new ArgumentNullException(paramName: nameof(first));<br \/>\n        this.second = second ?? throw new ArgumentNullException(paramName: nameof(second));<br \/>\n    }<\/p>\n<p>    public bool IsSatisfied(T item)<br \/>\n    {<br \/>\n        return first.IsSatisfied(item) &amp;&amp; second.IsSatisfied(item);<br \/>\n    }<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>  \u0645\u0631\u062d\u0644\u0647 4: \u0641\u06cc\u0644\u062a\u0631 \u0628\u0647\u062a\u0631 \u0631\u0627 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0646\u06cc\u062f<\/p>\n<p>\u062f\u0631 \u0646\u0647\u0627\u06cc\u062a\u060c \u0645\u0627 \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u06cc\u0645 BetterFilter \u06a9\u0644\u0627\u0633\u06cc \u06a9\u0647 \u0627\u0632 \u0645\u0634\u062e\u0635\u0627\u062a \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0645\u062d\u0635\u0648\u0644\u0627\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p>public class BetterFilter : IFilterProduct&gt;<br \/>\n{<br \/>\n    public IEnumerableProduct&gt; Filter(IEnumerableProduct&gt; items, ISpecificationProduct&gt; spec)<br \/>\n    {<br \/>\n        foreach (var i in items)<br \/>\n            if (spec.IsSatisfied(i))<br \/>\n                yield return i;<br \/>\n    }<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>  \u0646\u0645\u0627\u06cc\u0634: \u0642\u0631\u0627\u0631 \u062f\u0627\u062f\u0646 \u0647\u0645\u0647 \u0686\u06cc\u0632<\/p>\n<p>\u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0646\u0645\u0627\u06cc\u0634\u06cc \u0627\u0632 \u0646\u062d\u0648\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0641\u06cc\u0644\u062a\u0631 \u0627\u0635\u0644\u0627\u062d \u0634\u062f\u0647 \u0622\u0648\u0631\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<p>public class Demo<br \/>\n{<br \/>\n    static void Main(string[] args)<br \/>\n    {<br \/>\n        var apple = new Product(&#8220;Apple&#8221;, Color.Green, Size.Small);<br \/>\n        var tree = new Product(&#8220;Tree&#8221;, Color.Green, Size.Large);<br \/>\n        var house = new Product(&#8220;House&#8221;, Color.Blue, Size.Large);<\/p>\n<p>        Product[] products = { apple, tree, house };<\/p>\n<p>        var pf = new ProductFilter();<br \/>\n        WriteLine(&#8220;Green products (old):&#8221;);<br \/>\n        foreach (var p in pf.FilterByColor(products, Color.Green))<br \/>\n            WriteLine($&#8221; &#8211; {p.Name} is green&#8221;);<\/p>\n<p>        var bf = new BetterFilter();<br \/>\n        WriteLine(&#8220;Green products (new):&#8221;);<br \/>\n        foreach (var p in bf.Filter(products, new ColorSpecification(Color.Green)))<br \/>\n            WriteLine($&#8221; &#8211; {p.Name} is green&#8221;);<\/p>\n<p>        WriteLine(&#8220;Large products:&#8221;);<br \/>\n        foreach (var p in bf.Filter(products, new SizeSpecification(Size.Large)))<br \/>\n            WriteLine($&#8221; &#8211; {p.Name} is large&#8221;);<\/p>\n<p>        WriteLine(&#8220;Large blue items:&#8221;);<br \/>\n        foreach (var p in bf.Filter(products, new AndSpecificationProduct&gt;(new ColorSpecification(Color.Blue), new SizeSpecification(Size.Large))))<br \/>\n            WriteLine($&#8221; &#8211; {p.Name} is big and blue&#8221;);<br \/>\n    }<br \/>\n}<\/p>\n<p>    \u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/p>\n<p>    \u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/p>\n<p>  \u0646\u062a\u06cc\u062c\u0647<\/p>\n<p>\u0628\u0627 \u0627\u0639\u0645\u0627\u0644 \u0627\u0635\u0644 Open\/Closed \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0627\u0644\u06af\u0648\u06cc Specification\u060c \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0641\u06cc\u0644\u062a\u0631 \u0627\u0646\u0639\u0637\u0627\u0641 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0631\u062f\u06cc\u0645.  \u0627\u06cc\u0646 BetterFilter \u06a9\u0644\u0627\u0633 \u0628\u0631\u0627\u06cc \u06af\u0633\u062a\u0631\u0634 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0645\u0634\u062e\u0635\u0627\u062a \u062c\u062f\u06cc\u062f \u0628\u0627\u0632 \u0627\u0633\u062a \u0627\u0645\u0627 \u0628\u0631\u0627\u06cc \u0627\u0635\u0644\u0627\u062d \u0628\u0633\u062a\u0647 \u0627\u0633\u062a\u060c \u0632\u06cc\u0631\u0627 \u062f\u06cc\u06af\u0631 \u0646\u06cc\u0627\u0632\u06cc \u0628\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u0627\u062c\u0631\u0627\u06cc \u0622\u0646 \u0628\u0631\u0627\u06cc \u0627\u0641\u0632\u0648\u062f\u0646 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u062c\u062f\u06cc\u062f \u0646\u062f\u0627\u0631\u06cc\u0645.<\/p>\n<p>\u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0646\u0647 \u062a\u0646\u0647\u0627 \u0628\u0647 \u0627\u0635\u0648\u0644 SOLID \u067e\u0627\u06cc\u0628\u0646\u062f \u0627\u0633\u062a\u060c \u0628\u0644\u06a9\u0647 \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631\u06cc \u0648 \u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u06a9\u062f \u0645\u0627 \u0631\u0627 \u0646\u06cc\u0632 \u0627\u0641\u0632\u0627\u06cc\u0634 \u0645\u06cc \u062f\u0647\u062f \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u06af\u0633\u062a\u0631\u0634 \u0622\u0646 \u062f\u0631 \u0622\u06cc\u0646\u062f\u0647 \u0631\u0627 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<div data-article-id=\"1919150\" id=\"article-body\">\n<p>\u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u062f \u0645\u0627 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc\u060c \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0648\u06cc \u0628\u0627\u0642\u06cc \u0645\u06cc \u0645\u0627\u0646\u062f\u060c \u0627\u0633\u0627\u0633\u06cc \u0627\u0633\u062a.  \u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0648\u0644 \u06a9\u0644\u06cc\u062f\u06cc \u062f\u0631 \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u062c\u0627\u0645\u062f\u060c \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 (OCP) \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0627\u0635\u0644 \u0628\u06cc\u0627\u0646 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0646\u0631\u0645\u200c\u0627\u0641\u0632\u0627\u0631 \u0628\u0627\u06cc\u062f \u0628\u0631\u0627\u06cc \u062a\u0648\u0633\u0639\u0647 \u0628\u0627\u0632 \u0628\u0627\u0634\u0646\u062f \u0627\u0645\u0627 \u0628\u0631\u0627\u06cc \u0627\u0635\u0644\u0627\u062d \u0628\u0633\u062a\u0647 \u0634\u0648\u0646\u062f.  \u0628\u06cc\u0627\u06cc\u06cc\u062f \u0628\u0631\u0631\u0633\u06cc \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0628\u0647 \u0627\u06cc\u0646 \u0627\u0635\u0644 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0639\u0645\u0644\u06cc \u0645\u0631\u0628\u0648\u0637 \u0628\u0647 \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0645\u062d\u0635\u0648\u0644 \u067e\u0627\u06cc\u0628\u0646\u062f \u0628\u0627\u0634\u06cc\u0645.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%A7%D9%88%D9%84%DB%8C%D9%87_%D9%85%D8%B4%DA%A9%D9%84\" >\u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0627\u0648\u0644\u06cc\u0647: \u0645\u0634\u06a9\u0644<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#Refactoring_%D8%A8%D8%A7_OCP_%D8%B1%D8%A7%D9%87_%D8%AD%D9%84\" >Refactoring \u0628\u0627 OCP: \u0631\u0627\u0647 \u062d\u0644<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%85%D8%B1%D8%AD%D9%84%D9%87_1_%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B1%D8%A7%D8%A8%D8%B7\" >\u0645\u0631\u062d\u0644\u0647 1: \u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%85%D8%B1%D8%AD%D9%84%D9%87_2_%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D9%85%D8%B4%D8%AE%D8%B5%D8%A7%D8%AA\" >\u0645\u0631\u062d\u0644\u0647 2: \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0645\u0634\u062e\u0635\u0627\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%85%D8%B1%D8%AD%D9%84%D9%87_3_%D9%85%D8%B4%D8%AE%D8%B5%D8%A7%D8%AA_%D8%B1%D8%A7_%D8%AA%D8%B1%DA%A9%DB%8C%D8%A8_%DA%A9%D9%86%DB%8C%D8%AF\" >\u0645\u0631\u062d\u0644\u0647 3: \u0645\u0634\u062e\u0635\u0627\u062a \u0631\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u06a9\u0646\u06cc\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%85%D8%B1%D8%AD%D9%84%D9%87_4_%D9%81%DB%8C%D9%84%D8%AA%D8%B1_%D8%A8%D9%87%D8%AA%D8%B1_%D8%B1%D8%A7_%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%DA%A9%D9%86%DB%8C%D8%AF\" >\u0645\u0631\u062d\u0644\u0647 4: \u0641\u06cc\u0644\u062a\u0631 \u0628\u0647\u062a\u0631 \u0631\u0627 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0646\u06cc\u062f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%86%D9%85%D8%A7%DB%8C%D8%B4_%D9%82%D8%B1%D8%A7%D8%B1_%D8%AF%D8%A7%D8%AF%D9%86_%D9%87%D9%85%D9%87_%DA%86%DB%8C%D8%B2\" >\u0646\u0645\u0627\u06cc\u0634: \u0642\u0631\u0627\u0631 \u062f\u0627\u062f\u0646 \u0647\u0645\u0647 \u0686\u06cc\u0632<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nabfollower.com\/blog\/the-openclosed-principle-in-c-with-filters-and-specifications-3dd6\/#%D9%86%D8%AA%DB%8C%D8%AC%D9%87\" >\u0646\u062a\u06cc\u062c\u0647<\/a><\/li><\/ul><\/nav><\/div>\n<h4><span class=\"ez-toc-section\" id=\"%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%A7%D9%88%D9%84%DB%8C%D9%87_%D9%85%D8%B4%DA%A9%D9%84\"><\/span>\n<p>  \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0627\u0648\u0644\u06cc\u0647: \u0645\u0634\u06a9\u0644<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u062a\u0635\u0648\u0631 \u06a9\u0646\u06cc\u062f \u0645\u0627 \u06cc\u06a9 \u06a9\u0627\u062a\u0627\u0644\u0648\u06af \u0645\u062d\u0635\u0648\u0644 \u0633\u0627\u062f\u0647 \u062f\u0627\u0631\u06cc\u0645 \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u0647\u0631 \u0645\u062d\u0635\u0648\u0644 \u062f\u0627\u0631\u0627\u06cc \u0646\u0627\u0645\u060c \u0631\u0646\u06af \u0648 \u0627\u0646\u062f\u0627\u0632\u0647 \u0627\u0633\u062a.  \u0645\u0627 \u0628\u0647 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0627\u06cc\u0646 \u0645\u062d\u0635\u0648\u0644\u0627\u062a \u0628\u0631 \u0627\u0633\u0627\u0633 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u0645.  \u06cc\u06a9 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0633\u0627\u062f\u0647 \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0628\u0647 \u0634\u06a9\u0644 \u0632\u06cc\u0631 \u0628\u0627\u0634\u062f:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">enum<\/span> <span class=\"n\">Color<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"n\">Red<\/span><span class=\"p\">,<\/span> <span class=\"n\">Green<\/span><span class=\"p\">,<\/span> <span class=\"n\">Blue<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"k\">public<\/span> <span class=\"k\">enum<\/span> <span class=\"n\">Size<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"n\">Small<\/span><span class=\"p\">,<\/span> <span class=\"n\">Medium<\/span><span class=\"p\">,<\/span> <span class=\"n\">Large<\/span><span class=\"p\">,<\/span> <span class=\"n\">Yuge<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">Product<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">public<\/span> <span class=\"kt\">string<\/span> <span class=\"n\">Name<\/span><span class=\"p\">;<\/span>\n    <span class=\"k\">public<\/span> <span class=\"n\">Color<\/span> <span class=\"n\">Color<\/span><span class=\"p\">;<\/span>\n    <span class=\"k\">public<\/span> <span class=\"n\">Size<\/span> <span class=\"n\">Size<\/span><span class=\"p\">;<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"nf\">Product<\/span><span class=\"p\">(<\/span><span class=\"kt\">string<\/span> <span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span> <span class=\"n\">color<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span> <span class=\"n\">size<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"n\">Name<\/span> <span class=\"p\">=<\/span> <span class=\"n\">name<\/span> <span class=\"p\">??<\/span> <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ArgumentNullException<\/span><span class=\"p\">(<\/span><span class=\"n\">paramName<\/span><span class=\"p\">:<\/span> <span class=\"k\">nameof<\/span><span class=\"p\">(<\/span><span class=\"n\">name<\/span><span class=\"p\">));<\/span>\n        <span class=\"n\">Color<\/span> <span class=\"p\">=<\/span> <span class=\"n\">color<\/span><span class=\"p\">;<\/span>\n        <span class=\"n\">Size<\/span> <span class=\"p\">=<\/span> <span class=\"n\">size<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">ProductFilter<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">public<\/span> <span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"nf\">FilterByColor<\/span><span class=\"p\">(<\/span><span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span> <span class=\"n\">color<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">products<\/span><span class=\"p\">)<\/span>\n            <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Color<\/span> <span class=\"p\">==<\/span> <span class=\"n\">color<\/span><span class=\"p\">)<\/span>\n                <span class=\"k\">yield<\/span> <span class=\"k\">return<\/span> <span class=\"n\">p<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"k\">static<\/span> <span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"nf\">FilterBySize<\/span><span class=\"p\">(<\/span><span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span> <span class=\"n\">size<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">products<\/span><span class=\"p\">)<\/span>\n            <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Size<\/span> <span class=\"p\">==<\/span> <span class=\"n\">size<\/span><span class=\"p\">)<\/span>\n                <span class=\"k\">yield<\/span> <span class=\"k\">return<\/span> <span class=\"n\">p<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"k\">static<\/span> <span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"nf\">FilterBySizeAndColor<\/span><span class=\"p\">(<\/span><span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span> <span class=\"n\">size<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span> <span class=\"n\">color<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">products<\/span><span class=\"p\">)<\/span>\n            <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Size<\/span> <span class=\"p\">==<\/span> <span class=\"n\">size<\/span> <span class=\"p\">&amp;&amp;<\/span> <span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Color<\/span> <span class=\"p\">==<\/span> <span class=\"n\">color<\/span><span class=\"p\">)<\/span>\n                <span class=\"k\">yield<\/span> <span class=\"k\">return<\/span> <span class=\"n\">p<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u062d\u0627\u0644\u06cc \u06a9\u0647 \u0627\u06cc\u0646 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f\u060c \u0628\u0647 \u0631\u0627\u062d\u062a\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646 \u062f\u06cc\u062f \u06a9\u0647 \u0686\u06af\u0648\u0646\u0647 \u0645\u06cc \u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0633\u0631\u0639\u062a \u063a\u06cc\u0631\u0642\u0627\u0628\u0644 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0634\u0648\u062f.  \u0647\u0631 \u0645\u0639\u06cc\u0627\u0631 \u0641\u06cc\u0644\u062a\u0631 \u062c\u062f\u06cc\u062f \u06cc\u0627 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627 \u0646\u06cc\u0627\u0632 \u0628\u0647 \u0631\u0648\u0634 \u062c\u062f\u06cc\u062f\u06cc \u062f\u0627\u0631\u062f.  \u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 \u0631\u0627 \u0646\u0642\u0636 \u0645\u06cc\u200c\u06a9\u0646\u062f \u0632\u06cc\u0631\u0627 <code>ProductFilter<\/code> \u0647\u0631 \u0628\u0627\u0631 \u06a9\u0647 \u06cc\u06a9 \u0646\u06cc\u0627\u0632 \u0641\u06cc\u0644\u062a\u0631\u06cc\u0646\u06af \u062c\u062f\u06cc\u062f \u0645\u0639\u0631\u0641\u06cc \u0645\u06cc \u0634\u0648\u062f\u060c \u06a9\u0644\u0627\u0633 \u0628\u0627\u06cc\u062f \u0627\u0635\u0644\u0627\u062d \u0634\u0648\u062f.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Refactoring_%D8%A8%D8%A7_OCP_%D8%B1%D8%A7%D9%87_%D8%AD%D9%84\"><\/span>\n<p>  Refactoring \u0628\u0627 OCP: \u0631\u0627\u0647 \u062d\u0644<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u0628\u0631\u0627\u06cc \u067e\u0627\u06cc\u0628\u0646\u062f\u06cc \u0628\u0647 \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647\u060c \u0645\u0627 \u0628\u0647 \u0631\u0627\u0647\u06cc \u0628\u0631\u0627\u06cc \u06af\u0633\u062a\u0631\u0634 \u0639\u0645\u0644\u06a9\u0631\u062f \u0641\u06cc\u0644\u062a\u0631\u06cc\u0646\u06af \u062e\u0648\u062f \u0628\u062f\u0648\u0646 \u062a\u063a\u06cc\u06cc\u0631 \u06a9\u062f \u0645\u0648\u062c\u0648\u062f \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u0645.  \u0645\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u0644\u06af\u0648\u06cc Specification \u06a9\u0647 \u0628\u0647 \u0645\u0627 \u0627\u0645\u06a9\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u0645\u0639\u06cc\u0627\u0631\u0647\u0627 \u0631\u0627 \u0628\u0647 \u0631\u0648\u0634\u06cc \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f \u0648 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0646\u06cc\u0645\u060c \u0628\u0647 \u0627\u06cc\u0646 \u0647\u062f\u0641 \u062f\u0633\u062a \u06cc\u0627\u0628\u06cc\u0645.<\/p>\n<h5><span class=\"ez-toc-section\" id=\"%D9%85%D8%B1%D8%AD%D9%84%D9%87_1_%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B1%D8%A7%D8%A8%D8%B7\"><\/span>\n<p>  \u0645\u0631\u062d\u0644\u0647 1: \u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u0627\u0628\u062a\u062f\u0627 \u062f\u0648 \u0631\u0627\u0628\u0637 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u06cc\u0645: \u06cc\u06a9\u06cc \u0628\u0631\u0627\u06cc \u0645\u0634\u062e\u0635\u0627\u062a \u0648 \u062f\u06cc\u06af\u0631\u06cc \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631\u0647\u0627.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">interface<\/span> <span class=\"nc\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"kt\">bool<\/span> <span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">T<\/span> <span class=\"n\">item<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"k\">public<\/span> <span class=\"k\">interface<\/span> <span class=\"nc\">IFilter<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"nf\">Filter<\/span><span class=\"p\">(<\/span><span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">items<\/span><span class=\"p\">,<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">spec<\/span><span class=\"p\">);<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/span><\/span><\/span><\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h5><span class=\"ez-toc-section\" id=\"%D9%85%D8%B1%D8%AD%D9%84%D9%87_2_%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D9%85%D8%B4%D8%AE%D8%B5%D8%A7%D8%AA\"><\/span>\n<p>  \u0645\u0631\u062d\u0644\u0647 2: \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0645\u0634\u062e\u0635\u0627\u062a<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u062f\u0631 \u0645\u0631\u062d\u0644\u0647 \u0628\u0639\u062f\u060c \u0645\u0634\u062e\u0635\u0627\u062a \u0628\u062a\u0646 \u0631\u0627 \u0628\u0631\u0627\u06cc \u0631\u0646\u06af \u0648 \u0627\u0646\u062f\u0627\u0632\u0647 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u06cc\u0645.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">ColorSpecification<\/span> <span class=\"p\">:<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">private<\/span> <span class=\"n\">Color<\/span> <span class=\"n\">color<\/span><span class=\"p\">;<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"nf\">ColorSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Color<\/span> <span class=\"n\">color<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"n\">color<\/span> <span class=\"p\">=<\/span> <span class=\"n\">color<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"kt\">bool<\/span> <span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">Product<\/span> <span class=\"n\">p<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Color<\/span> <span class=\"p\">==<\/span> <span class=\"n\">color<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n\n<span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">SizeSpecification<\/span> <span class=\"p\">:<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">private<\/span> <span class=\"n\">Size<\/span> <span class=\"n\">size<\/span><span class=\"p\">;<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"nf\">SizeSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Size<\/span> <span class=\"n\">size<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"n\">size<\/span> <span class=\"p\">=<\/span> <span class=\"n\">size<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"kt\">bool<\/span> <span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">Product<\/span> <span class=\"n\">p<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Size<\/span> <span class=\"p\">==<\/span> <span class=\"n\">size<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h5><span class=\"ez-toc-section\" id=\"%D9%85%D8%B1%D8%AD%D9%84%D9%87_3_%D9%85%D8%B4%D8%AE%D8%B5%D8%A7%D8%AA_%D8%B1%D8%A7_%D8%AA%D8%B1%DA%A9%DB%8C%D8%A8_%DA%A9%D9%86%DB%8C%D8%AF\"><\/span>\n<p>  \u0645\u0631\u062d\u0644\u0647 3: \u0645\u0634\u062e\u0635\u0627\u062a \u0631\u0627 \u062a\u0631\u06a9\u06cc\u0628 \u06a9\u0646\u06cc\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u0645\u0627 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0645\u0634\u062e\u0635\u0627\u062a \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0628\u0631\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628 \u0686\u0646\u062f\u06cc\u0646 \u0645\u0639\u06cc\u0627\u0631 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u0645.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">AndSpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"p\">:<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">private<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">first<\/span><span class=\"p\">,<\/span> <span class=\"n\">second<\/span><span class=\"p\">;<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"nf\">AndSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">first<\/span><span class=\"p\">,<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">T<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">second<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"n\">first<\/span> <span class=\"p\">=<\/span> <span class=\"n\">first<\/span> <span class=\"p\">??<\/span> <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ArgumentNullException<\/span><span class=\"p\">(<\/span><span class=\"n\">paramName<\/span><span class=\"p\">:<\/span> <span class=\"k\">nameof<\/span><span class=\"p\">(<\/span><span class=\"n\">first<\/span><span class=\"p\">));<\/span>\n        <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"n\">second<\/span> <span class=\"p\">=<\/span> <span class=\"n\">second<\/span> <span class=\"p\">??<\/span> <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ArgumentNullException<\/span><span class=\"p\">(<\/span><span class=\"n\">paramName<\/span><span class=\"p\">:<\/span> <span class=\"k\">nameof<\/span><span class=\"p\">(<\/span><span class=\"n\">second<\/span><span class=\"p\">));<\/span>\n    <span class=\"p\">}<\/span>\n\n    <span class=\"k\">public<\/span> <span class=\"kt\">bool<\/span> <span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">T<\/span> <span class=\"n\">item<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">first<\/span><span class=\"p\">.<\/span><span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">item<\/span><span class=\"p\">)<\/span> <span class=\"p\">&amp;&amp;<\/span> <span class=\"n\">second<\/span><span class=\"p\">.<\/span><span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">item<\/span><span class=\"p\">);<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/span><\/span><\/span><\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h5><span class=\"ez-toc-section\" id=\"%D9%85%D8%B1%D8%AD%D9%84%D9%87_4_%D9%81%DB%8C%D9%84%D8%AA%D8%B1_%D8%A8%D9%87%D8%AA%D8%B1_%D8%B1%D8%A7_%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%DA%A9%D9%86%DB%8C%D8%AF\"><\/span>\n<p>  \u0645\u0631\u062d\u0644\u0647 4: \u0641\u06cc\u0644\u062a\u0631 \u0628\u0647\u062a\u0631 \u0631\u0627 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0646\u06cc\u062f<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>\u062f\u0631 \u0646\u0647\u0627\u06cc\u062a\u060c \u0645\u0627 \u0631\u0627 \u0627\u062c\u0631\u0627 \u0645\u06cc \u06a9\u0646\u06cc\u0645 <code>BetterFilter<\/code> \u06a9\u0644\u0627\u0633\u06cc \u06a9\u0647 \u0627\u0632 \u0645\u0634\u062e\u0635\u0627\u062a \u0628\u0631\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0631\u062f\u0646 \u0645\u062d\u0635\u0648\u0644\u0627\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">BetterFilter<\/span> <span class=\"p\">:<\/span> <span class=\"n\">IFilter<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">public<\/span> <span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"nf\">Filter<\/span><span class=\"p\">(<\/span><span class=\"n\">IEnumerable<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">items<\/span><span class=\"p\">,<\/span> <span class=\"n\">ISpecification<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;<\/span> <span class=\"n\">spec<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">i<\/span> <span class=\"k\">in<\/span> <span class=\"n\">items<\/span><span class=\"p\">)<\/span>\n            <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">spec<\/span><span class=\"p\">.<\/span><span class=\"nf\">IsSatisfied<\/span><span class=\"p\">(<\/span><span class=\"n\">i<\/span><span class=\"p\">))<\/span>\n                <span class=\"k\">yield<\/span> <span class=\"k\">return<\/span> <span class=\"n\">i<\/span><span class=\"p\">;<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/span><\/span><\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h4><span class=\"ez-toc-section\" id=\"%D9%86%D9%85%D8%A7%DB%8C%D8%B4_%D9%82%D8%B1%D8%A7%D8%B1_%D8%AF%D8%A7%D8%AF%D9%86_%D9%87%D9%85%D9%87_%DA%86%DB%8C%D8%B2\"><\/span>\n<p>  \u0646\u0645\u0627\u06cc\u0634: \u0642\u0631\u0627\u0631 \u062f\u0627\u062f\u0646 \u0647\u0645\u0647 \u0686\u06cc\u0632<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0646\u0645\u0627\u06cc\u0634\u06cc \u0627\u0632 \u0646\u062d\u0648\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0633\u06cc\u0633\u062a\u0645 \u0641\u06cc\u0644\u062a\u0631 \u0627\u0635\u0644\u0627\u062d \u0634\u062f\u0647 \u0622\u0648\u0631\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight csharp\"><code><span class=\"k\">public<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">Demo<\/span>\n<span class=\"p\">{<\/span>\n    <span class=\"k\">static<\/span> <span class=\"k\">void<\/span> <span class=\"nf\">Main<\/span><span class=\"p\">(<\/span><span class=\"kt\">string<\/span><span class=\"p\">[]<\/span> <span class=\"n\">args<\/span><span class=\"p\">)<\/span>\n    <span class=\"p\">{<\/span>\n        <span class=\"kt\">var<\/span> <span class=\"n\">apple<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Product<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Apple\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Green<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span><span class=\"p\">.<\/span><span class=\"n\">Small<\/span><span class=\"p\">);<\/span>\n        <span class=\"kt\">var<\/span> <span class=\"n\">tree<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Product<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Tree\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Green<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span><span class=\"p\">.<\/span><span class=\"n\">Large<\/span><span class=\"p\">);<\/span>\n        <span class=\"kt\">var<\/span> <span class=\"n\">house<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">Product<\/span><span class=\"p\">(<\/span><span class=\"s\">\"House\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Blue<\/span><span class=\"p\">,<\/span> <span class=\"n\">Size<\/span><span class=\"p\">.<\/span><span class=\"n\">Large<\/span><span class=\"p\">);<\/span>\n\n        <span class=\"n\">Product<\/span><span class=\"p\">[]<\/span> <span class=\"n\">products<\/span> <span class=\"p\">=<\/span> <span class=\"p\">{<\/span> <span class=\"n\">apple<\/span><span class=\"p\">,<\/span> <span class=\"n\">tree<\/span><span class=\"p\">,<\/span> <span class=\"n\">house<\/span> <span class=\"p\">};<\/span>\n\n        <span class=\"kt\">var<\/span> <span class=\"n\">pf<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ProductFilter<\/span><span class=\"p\">();<\/span>\n        <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Green products (old):\"<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">pf<\/span><span class=\"p\">.<\/span><span class=\"nf\">FilterByColor<\/span><span class=\"p\">(<\/span><span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Green<\/span><span class=\"p\">))<\/span>\n            <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">$\" - <\/span><span class=\"p\">{<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Name<\/span><span class=\"p\">}<\/span><span class=\"s\"> is green\"<\/span><span class=\"p\">);<\/span>\n\n        <span class=\"kt\">var<\/span> <span class=\"n\">bf<\/span> <span class=\"p\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">BetterFilter<\/span><span class=\"p\">();<\/span>\n        <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Green products (new):\"<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">bf<\/span><span class=\"p\">.<\/span><span class=\"nf\">Filter<\/span><span class=\"p\">(<\/span><span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">ColorSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Green<\/span><span class=\"p\">)))<\/span>\n            <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">$\" - <\/span><span class=\"p\">{<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Name<\/span><span class=\"p\">}<\/span><span class=\"s\"> is green\"<\/span><span class=\"p\">);<\/span>\n\n        <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Large products:\"<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">bf<\/span><span class=\"p\">.<\/span><span class=\"nf\">Filter<\/span><span class=\"p\">(<\/span><span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">SizeSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Size<\/span><span class=\"p\">.<\/span><span class=\"n\">Large<\/span><span class=\"p\">)))<\/span>\n            <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">$\" - <\/span><span class=\"p\">{<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Name<\/span><span class=\"p\">}<\/span><span class=\"s\"> is large\"<\/span><span class=\"p\">);<\/span>\n\n        <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Large blue items:\"<\/span><span class=\"p\">);<\/span>\n        <span class=\"k\">foreach<\/span> <span class=\"p\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"k\">in<\/span> <span class=\"n\">bf<\/span><span class=\"p\">.<\/span><span class=\"nf\">Filter<\/span><span class=\"p\">(<\/span><span class=\"n\">products<\/span><span class=\"p\">,<\/span> <span class=\"k\">new<\/span> <span class=\"n\">AndSpecification<\/span><span class=\"p\"><span class=\"n\">Product<\/span><span class=\"p\">&gt;(<\/span><span class=\"k\">new<\/span> <span class=\"nf\">ColorSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Color<\/span><span class=\"p\">.<\/span><span class=\"n\">Blue<\/span><span class=\"p\">),<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">SizeSpecification<\/span><span class=\"p\">(<\/span><span class=\"n\">Size<\/span><span class=\"p\">.<\/span><span class=\"n\">Large<\/span><span class=\"p\">))))<\/span>\n            <span class=\"nf\">WriteLine<\/span><span class=\"p\">(<\/span><span class=\"s\">$\" - <\/span><span class=\"p\">{<\/span><span class=\"n\">p<\/span><span class=\"p\">.<\/span><span class=\"n\">Name<\/span><span class=\"p\">}<\/span><span class=\"s\"> is big and blue\"<\/span><span class=\"p\">);<\/span>\n    <span class=\"p\">}<\/span>\n<span class=\"p\">}<\/span>\n<\/span><\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h4><span class=\"ez-toc-section\" id=\"%D9%86%D8%AA%DB%8C%D8%AC%D9%87\"><\/span>\n<p>  \u0646\u062a\u06cc\u062c\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u0628\u0627 \u0627\u0639\u0645\u0627\u0644 \u0627\u0635\u0644 Open\/Closed \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0627\u0644\u06af\u0648\u06cc Specification\u060c \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0641\u06cc\u0644\u062a\u0631 \u0627\u0646\u0639\u0637\u0627\u0641 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0631\u062f\u06cc\u0645.  \u0627\u06cc\u0646 <code>BetterFilter<\/code> \u06a9\u0644\u0627\u0633 \u0628\u0631\u0627\u06cc \u06af\u0633\u062a\u0631\u0634 \u0627\u0632 \u0637\u0631\u06cc\u0642 \u0645\u0634\u062e\u0635\u0627\u062a \u062c\u062f\u06cc\u062f \u0628\u0627\u0632 \u0627\u0633\u062a \u0627\u0645\u0627 \u0628\u0631\u0627\u06cc \u0627\u0635\u0644\u0627\u062d \u0628\u0633\u062a\u0647 \u0627\u0633\u062a\u060c \u0632\u06cc\u0631\u0627 \u062f\u06cc\u06af\u0631 \u0646\u06cc\u0627\u0632\u06cc \u0628\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u0627\u062c\u0631\u0627\u06cc \u0622\u0646 \u0628\u0631\u0627\u06cc \u0627\u0641\u0632\u0648\u062f\u0646 \u0645\u0639\u06cc\u0627\u0631\u0647\u0627\u06cc \u0641\u06cc\u0644\u062a\u0631 \u062c\u062f\u06cc\u062f \u0646\u062f\u0627\u0631\u06cc\u0645.<\/p>\n<p>\u0627\u06cc\u0646 \u0631\u0648\u06cc\u06a9\u0631\u062f \u0646\u0647 \u062a\u0646\u0647\u0627 \u0628\u0647 \u0627\u0635\u0648\u0644 SOLID \u067e\u0627\u06cc\u0628\u0646\u062f \u0627\u0633\u062a\u060c \u0628\u0644\u06a9\u0647 \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631\u06cc \u0648 \u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u06a9\u062f \u0645\u0627 \u0631\u0627 \u0646\u06cc\u0632 \u0627\u0641\u0632\u0627\u06cc\u0634 \u0645\u06cc \u062f\u0647\u062f \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u06af\u0633\u062a\u0631\u0634 \u0622\u0646 \u062f\u0631 \u0622\u06cc\u0646\u062f\u0647 \u0631\u0627 \u0622\u0633\u0627\u0646 \u062a\u0631 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summarize this content to 400 words in Persian Lang \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u06a9\u062f \u0645\u0627 \u0642\u0627\u0628\u0644 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc\u060c \u0645\u0642\u06cc\u0627\u0633 \u067e\u0630\u06cc\u0631 \u0648 \u0642\u0648\u06cc \u0628\u0627\u0642\u06cc \u0645\u06cc \u0645\u0627\u0646\u062f\u060c \u0627\u0633\u0627\u0633\u06cc \u0627\u0633\u062a. \u06cc\u06a9\u06cc \u0627\u0632 \u0627\u0635\u0648\u0644 \u06a9\u0644\u06cc\u062f\u06cc \u062f\u0631 \u0627\u0635\u0648\u0644 \u0637\u0631\u0627\u062d\u06cc \u062c\u0627\u0645\u062f\u060c \u0627\u0635\u0644 \u0628\u0627\u0632\/\u0628\u0633\u062a\u0647 (OCP) \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0627\u0635\u0644 \u0628\u06cc\u0627\u0646 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a\u200c\u0647\u0627\u06cc \u0646\u0631\u0645\u200c\u0627\u0641\u0632\u0627\u0631 \u0628\u0627\u06cc\u062f \u0628\u0631\u0627\u06cc \u062a\u0648\u0633\u0639\u0647 \u0628\u0627\u0632 \u0628\u0627\u0634\u0646\u062f \u0627\u0645\u0627 &hellip;<\/p>\n","protected":false},"author":2,"featured_media":68914,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-68913","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/68913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=68913"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/68913\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/68914"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=68913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=68913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=68913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}