What is a delegate C sharp?

C# delegates are similar to pointers to functions, in C or C++. A delegate is a reference type variable that holds the reference to a method. The reference can be changed at runtime. Delegates are especially used for implementing events and the call-back methods. All delegates are implicitly derived from the System.

What is delegate and types of delegate?

Definition. A delegate(known as function pointer in C/C++) is a references type that invokes single/multiple method(s) through the delegate instance. It holds a reference of the methods. Delegate types are sealed and immutable type.

What is delegate in C# with real time example?

It is a reference type. It is a function pointer or it holds a reference (pointer) to a function (method). It is type safe. Delegates are mainly used for the event handling and the callback methods.

What are the advantages of using delegates in C#?

Delegates allow methods to be passed as parameters. Delegates are type safe function pointer. Delegate instances attach or detach a method at run time making it more dynamic and flexible to use. Delegates can invoke more than one method using the Multicast feature.

When would you use delegates instead of interfaces?

An Interface or Delegate is being used by an object. Both have no knowledge of the class that implement….When should Delegate be used in place of Interface

1. If Interface defines only a single method then we should use Delegate.
2. If multicast is required.
3. If subscriber need to implement the interface multiple times.

What is a delegation simple definition?

1 : the act of giving someone authority or responsibility for. 2 : one or more persons chosen to represent others. delegation. noun.

Why are delegates used?

Delegates are used to define callback methods and implement event handling, and they are declared using the “delegate” keyword. You can declare a delegate that can appear on its own or even nested inside a class.

What is the difference between an interface and a delegate?

Interface calls are faster than delegate calls. An interface reference is a reference to an instance of an object which implements the interface. An interface call is not that different from an ordinary virtual call to an method. A delegate reference, on the other hand, is a reference to a list of method pointers.

What is difference between delegate and interface in C#?

Delegates and Interfaces are two distinct concepts in C#. Interfaces allow to extend some object’s functionality, it’s a contract between the interface and the object that implements it, while delegates are just safe callbacks, they are a sort of function pointers.