Question

I have a method with declaration like this:

public void OriginalMethod(Func<object,bool> selector)

And I would like to call it from generic method, that has declaration like this:

public void GenericMethod<T>(Func<T, bool> selector)

How do I do that?

Answer 1

You can’t pass the selector directly to OriginalMethod: it expects a method that accepts any object, but a Func<T, bool> accepts only an object of type T.

Of course, you can cheat:

OriginalMethod(o => selector((T)o));

But if OriginalMethod calls the method with an object that is not convertible to T, it will fail…