this keyword in c#

"this" keyword is used to  refer the current instance or current object
->local variable will be more priority to global variable(if they are same class)
->Static member functions do not have a this pointer
->The this keyword can be used to access members from within constructors, instance methods, and instance accessors.

Sample Code:

{

 A a =new A();

 a.m(12);

 Response.Write(a.x);

  }

}

public class A

  {

   public int x=20; // global variable

  public void m(int x);

    {

        this.x=this.x+x;

     }

}