C# - Casting a Generic Delegate to a Non Generic Delegate-CodePudding

I have a generic delegate that accepts a argument, Args<T>. I also have a normal delegate which accepts Args.

delegate Task ExampleDelegate<T>(Args<T> args)

delegate Task ExampleDelegate(Args args)

Args<T> extends from Args

public class Args {

}

public class Args<T> : Args {

}

I am currently extending my non generic interfaces/classes which use ExampleDelegate to create new generic interfaces/classes using ExampleDelegate<T>.

Since all of them extend the non-generic versions, it has been painless to extend them so far until I had to override a method which accepts ExampleDelegate.

I haven't been able to cast ExampleDelegate<T> into ExampleDelegate since the signatures don't match.

One of the ways I was able to this was,

ExampleDelegate<SomeClass> genericDelegate= //some method

//First case
ExampleDelegate nonGenericDelegate = args => genericDelegate(args as Args<SomeClass>);

//Second case
genericDelegate = argsT => nonGenericDelegate(argsT);

Is there any better way of doing this?

Update: Is it possible to do this without creating an anonymous method like the one above?

CodePudding user response：

Is there any better way of doing this?

Probably yes, but we don't know what you are trying to do so we can't help you

I don't see why I need to cast explicitly in the second case as well?

You don't...? Here is some code that compiles just fine:

class TestClass
{
    void DoStuff()
    {
        ExampleDelegate nonGeneric = a => { };
        ExampleDelegate<int> generic = b => nonGeneric(b);
    }
}

delegate void ExampleDelegate(Args args);

delegate void ExampleDelegate<T>(Args<T> args);

class Args<T> : Args {}

class Args {}