Pro EP 70 : Difference b/w Delegate, Func, Action and Predicate ?

Delegates, Func, Action and Predicate in C# ?

Delegates is a pointer to function. It helps us in communication and call backs.

We have three built in generic delegates:

1) Func: It takes a generic input and returns generic output

2) Action: It takes a generic input and returns nothing

3) Predicate: It takes a generic input and always returns Boolean

These generic delegates are used extensively in built in classes of .NET and we can use them to make our delegates shorter

Do you wanna see them in real example:
- Create a class Student with some properties
- Make a list of Student type
- Add some values

Following LINQ methods uses delegates:
.Select method takes Func
.ForEach method takes an Action
.FindAll method takes a Predicate

How often do you use them in code ?

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