C# Is it possible to create optional generic type constraints

Question

I think I know the answer to this but I have the need to specify that a generic method can take a type based on two optional constraints. That being that T can be either one type or another.

public WebPage Click<T>(Func<WebPage> predicate) where T : LinkBase || FieldBase, new()
{
    WebDriver.FindElement(new T().LinkPath).Click();
    WebDriver.Wait();
    return predicate.Invoke();
}

I know that there is no such syntax currently, but is there a way to solve this without duplicating the method to constrain on both types? If not, is this in the realms of possibility for a future version of the language?

Answer 1

Doing this does not make sense if LinkBase and FieldBase do not have a common base or implement a common interface. And if they do, then you can simply use that one as the constraint.

I 'm saying it does not make sense because the very reason of using type constraints is to make sure that the actual generic type parameter used supports a known public interface (otherwise, you could have just made the whole thing to be non-generic and use object). But if you have a hypothetical "or" constraint, how would the compiler be able to make sure that the code you write inside the generic will actually be meaningful for the type parameter that ends up being specified?