CSHARP

c# extension

public static class MyClassExtension
{
  // This is the method you are adding to a class "MyClass"
  public static string GetValue(this MyClass myClass)
  {
    return value.toString();
  }
}

// This is how you can use it in other parts of your code
MyClass myClass = new MyClass();
string s = myClass.GetValue();

extension of c sharp

static void main(string[] args)
{
    int num1 = 125;
    int num2 = 12.5;
    int num3 = num1/num2
    Console.WriteLine(num3)
}