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What are delegates and their uses? Also, give an example.

Revati S Misra 201 14-Apr-2023

What are delegates and their uses? Also, give an example.

oops c#  oops  delegates 
Updated on 19-Apr-2023
Revati S Misra

Revati S Misra

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Sanjay Goenka

Sanjay Goenka

19-Apr-2023

In C#, a delegate is a type that represents a method signature. Delegates allow you to treat methods as objects, which can be passed as arguments to other methods or stored as variables. Delegates provide a way to implement the observer pattern and to write callback functions.

public delegate void MyDelegate(string message);
public class MyClass
{
  public void MethodA(string message)
  {
      Console.WriteLine($"MethodA: {message}");
  }
  public void MethodB(string message)
  {
      Console.WriteLine($"MethodB: {message}"); } } public class Program { public static void Main() { MyClass obj = new MyClass(); MyDelegate del1 = new MyDelegate(obj.MethodA); MyDelegate del2 = new MyDelegate(obj.MethodB); // Call the delegate with different messages del1("Hello"); del2("World"); } }

In this example, we define a delegate named "MyDelegate" that takes a single string parameter and returns void. We also define a class "MyClass" that contains two methods, "MethodA" and "MethodB", that match the signature of the delegate.

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