Delegates can be used to hold the reference of method. A delegate is a type that safety encapsulates a method and it is similar to function pointer in C and C++. Delegates can be used to define call back methods. Delegate class hold only those methods which have same signature. It allow methods to be passed as parameters. A delegate can be seen as a placeholder for method.
Delegates can be chained multiple methods together and can be called on a single event.
Suppose if you have multiple methods with same signature which have same return type & number of parameters and want to call all the methods with single object then we can go for delegates.
Creating and using delegates involve the four steps:
1. Declaring a delegates
2. Defining a delegate method
3. Creating delegate object
4. Invoking delegate object
Delegates can be chained multiple methods together and can be called on a single event.
Suppose if you have multiple methods with same signature which have same return type & number of parameters and want to call all the methods with single object then we can go for delegates.
Creating and using delegates involve the four steps:
1. Declaring a delegates
2. Defining a delegate method
3. Creating delegate object
4. Invoking delegate object
Types of Delegates
1. Single cast delegate
Delegate that represent only a single method is known as Single Cast Delegate.
2. Multi Cast Delegate
Delegate that represent more than one method is known as Multi Cast Delegate.
Use += operator to add reference of more method to delegate
Use -= operator to remove reference of a method
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