Introduction to Delegate
In this article I have explain the delegate in C#.
is a type which holds the methods reference in an object. When we are creating
delegates, we are actually creating an object that can hold a reference to a
Delegate is basically known as function pointer. A delegate declaration
defines a type that encapsulates a method with a particular set of arguments and
return type. For static methods, a delegate object encapsulates the method to be
called. For instance methods, a delegate object encapsulates both an instance
and a method on the instance. If you have a delegate object and an appropriate
set of arguments, you can invoke the delegate with the arguments.
Now lets see a simple example how can we use
the Delegate in C#
public delegate int IntroDelegate(int a,int b);
static int Show(int x,int y)
static void Main(string args)
IntroDelegate delObj = new IntroDelegate(Show);
int v1 = 10;
int v2 = 20;
int res = delObj(v1,v2);
Console.WriteLine ("Result :"+res);
Explanation of the above program
is declared with int type and accepts two integer parameters. Inside the
class, the method named
is defined with int return type
and with two integer parameters. It is essential to
declare delegate and method with a
same signature and parameter type.
- Inside the
delegate instance is created and the function name is passed to the
delegate instance as follows:
IntroDelegate delObj =
- After this, we are taking two values and
passing those values to the delegate
as we do using method.
- Now the
delegate object encapsulates the method functionalities and returns
the result as we specified in the method.
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