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Delegate

IT Notes → C# @ December 22, 2020

  • It is similar to function pointer and is type safe.
  • It dynamically wires up a method caller to its target method.
  • It helps in writing plug-in methods.
  • A delegate can have more specific parameter types than its method target. This is called contravariance.
  • The return type of a delegate can be less specific than the return type of its target method. This is called covariance.
  • Func and Action delegates.
  • Internally System.Delegate acts as base for System.MulticastDelegate which has target (class = null for static) and method which holds instance of MethodInfo class for the method.
  • Anonymous delegate:
  • delegate del = delegate(params){}; 

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