Is it possible to declare a general delegate without parameters?

Question

I have...

Func<string> del2 = new Func<string>(MyMethod); 

and I really want to do this.

 Func<> del2 = new Func<>(MyMethod); 

therefore, the return type of the callback method is invalid. Is this possible with the generic func type?

Answer 1

The Func delegate family is for methods that take zero or more parameters and return a value. For methods that take zero or more parameters, do not return a value using one of the Action delegates. If the method has no parameters, use the non-generic version of Action :

 Action del = MyMethod; 

Answer 2

Yes the function returning void (no value) is Action

 public Test() { // first approach Action firstApproach = delegate { // do your stuff }; firstApproach(); //second approach Action secondApproach = MyMethod; secondApproach(); } void MyMethod() { // do your stuff } 

hope this helps

Answer 3

Use the Delegation type of action .

Answer 4

In cases where you forcefully use Func<T> , for example. in the internal general API that you want to reuse, you can simply define it as new Func<object>(() => { SomeStuff(); return null; }); .