Syntax of delegate

  1. Delegate [ data-type ] [ delegate-name] [argument-list]

Following example demonstrates about Multicasting of a delegate with Arithmatic operations.When you instantiate a delegate, you can associate its instance with any method with a compatible signature and return type.

Let see the example:

  1. using System;
  3. namespace Delegate_Operation
  4. {
  5. delegate int Delegate(int x, int y);
  7. class Delegate_Exmaple
  8. {
  9. static Delegate dobj = Add;
  11. static int Add(int a, int b)
  12. {
  13. return a + b;
  14. }
  16. static int Sub(int a, int b)
  17. {
  18. return a - b;
  19. }
  21. static int Mul(int a, int b)
  22. {
  23. return a * b;
  24. }
  26. static int Div(int a, int b)
  27. {
  28. return a / b;
  29. }
  30. static void Main(String[] args)
  31. {
  32. int call;
  34. call = dobj.Invoke(5, 5);
  35. Console.WriteLine("The Sum of {0} + {1} is : {2}",5,5,call);
  36. Console.WriteLine();
  38. dobj += new Delegate(Sub);
  39. call = dobj.Invoke(5, 5);
  40. Console.WriteLine("The Difference of {0} - {1} is : {2}", 5, 5, call);
  41. Console.WriteLine();
  43. dobj += new Delegate(Mul);
  44. call = dobj.Invoke(5, 5);
  45. Console.WriteLine("The Multiplication of {0} * {1} is : {2}", 5, 5, call);
  46. Console.WriteLine();
  48. dobj += new Delegate(Div);
  49. call = dobj.Invoke(5, 5);
  50. Console.WriteLine("The Divition of {0} / {1} is : {2}", 5, 5, call);
  52. Console.ReadKey();
  53. }
  54. }
  55. }

Now deploy this code,so you will get following result

Hope, this example will help you..! Cheers....