C# Method overload resolution not selecting concrete generic override

Question

This complete C# program illustrates the issue:

public abstract class Executor
{
    public abstract void Execute(T item);
}

class StringExecutor :         


        

Answer 1

As mentioned in Jon Skeet's article on overloading, when invoking a method in a class that also overrides a method with the same name from a base class, the compiler will always take the in-class method instead of the override, regardless of the "specificness" of type, provided that the signature is "compatible".

Jon goes on to point out that this is an excellent argument for avoiding overloading across inheritance boundaries, since this is exactly the kind of unexpected behavior that can occur.