روش های C #

using System;

class Program
{
   static void Main()
   {
      string course1 = ".NET";
      string course2 = "English";

      string message = "Welcome to .NET course";

      string replacedString = message.Replace(course1, course2);

      Console.WriteLine(replacedString);
   }
}

using System;

class Program
{
   static void Main()
   {
      string matn = "Hello World";
      string message = matn.Substring(6, 5);

      Console.WriteLine(index);
   }
}

using System;

class Program
{
   static void Main()
   {
      string text = "Hello World";
      int index = text.IndexOf(World);

      Console.WriteLine(index);
   }
}

using System;

class Program
{
    static void Main()
    {
        int message = string.Compare("Olma", "Anor");

        Console.WriteLine(message);
    }
}

using System;

class Program
{
   static void Main()
   {
      string matn = "  Salom, Dunyo  ";
      string message = matn.Trim();

      Console.WriteLine(message);
   }
}

string str1 = "Hello, WORLD !";
string str2 = str1.ToLower();
Console.Write(str2);
 //output: hello, world !

string str1 = "Hello, World !";
string str2 = str1.ToUpper();
Console.Write(str2);
 //output: HELLO, WORLD !

string satr="satr,ustun,katakcha";
string [] massiv=satr.Split(',');
foreach (string a in massiv)
    Console.WriteLine(a);

/* output: 
satr
ustun
katakcha
*/

string str = "Hello! How are you?";
string[] myString = str.Split();
//output: 
myString[0] = "Hello!"
myString[1] = "How"
myString[2] = "are"
myString[3] = "you?"

string str1 = "Hello World";
string str2 = "He";
bool result = str1.StartsWith(str2);
//output: result = True

string str1 = "Hello World";
string str2 = "bye";
bool result = str1.Contains(str2);
Console.Write(result);   //output: False

Console.Write(str1.Contains("rld"));  // output: True

Console.Write(str1.Contains('a')); // output: False

string FirstName = "Farrukh";
string LastName = "Kholmatov";
string name = string.Concat(Firstname, Lastname);
//output: Farrukh Kholmatov