How are delegate types similar to function pointers?
A delegate is a type that safely encapsulates a method, similar to a function pointer in C and C++. Unlike C function pointers, delegates are object-oriented, type safe, and secure.
Is it possible to derive custom classes from a delegate?
Delegate types are sealed —they cannot be derived from— and it is not possible to derive custom classes from Delegate. Because the instantiated delegate is an object, it can be passed as a parameter, or assigned to a property. This allows a method to accept a delegate as a parameter, and call the delegate at some later time.
Why does the delegate not have an example?
The delegate does not have an argument of type Example because the first parameter of the method always receives the bound instance of Example. When the delegate is invoked, only the int argument is supplied. This dynamic method accesses a private field of the Example class and returns the product of the private field and the int argument.
How to add an extra method to the delegate list?
To add an extra method to the delegate’s list of methods—the invocation list—simply requires adding two delegates using the addition or addition assignment operators (‘+’ or ‘+=’). For example: var obj = new MethodClass (); Del d1 = obj.Method1; Del d2 = obj.Method2; Del d3 = DelegateMethod; //Both types of assignment are valid.
How are delegates used in C # programming guide?
Using Delegates (C# Programming Guide) Event source objects send event notifications to recipient objects that have registered to receive that event. To register for an event, the recipient creates a method designed to handle the event, then creates a delegate for that method and passes the delegate to the event source.
What happens when a delegate is instantiated in MSDN?
Once a delegate is instantiated, a method call made to the delegate will be passed by the delegate to that method. The parameters passed to the delegate by the caller are passed to the method, and the return value, if any, from the method is returned to the caller by the delegate. This is known as invoking the delegate.