C# How to reference default interface implementation in implementer class

Question

Consider the following interface, with a default implementation of TestMethod

public interface TestInterface
{
    public int TestMethod()
    {
        return 15;
    }
}

Calling TestMethod in the following class will cause a StackOverflowException:

public class TestClass : TestInterface
{
    public int TestMethod()
    {
        return 1 + (this as TestInterface).TestMethod();
    }
}

Now I understand why this is, but is there any way to get around it? Something like base.TestMethod() for referencing one of the class's implemented interfaces?

I know I could rename the method in TestInterface and reference it in TestClass that way, but that would cause problems for other classes that don't need to reference the default implementation.

See https://stackoverflow.com/questions/59398027/c-sharp-8-base-interfaces-default-method-invocation-workaround — Hank, Nov 22 '21 at 18:22

score -1 · Answer 1 · answered Nov 22 '21 at 18:23

-1

you need to use "public override" to do what you are asking.

answered Nov 22 '21 at 18:23

Sye

17
5

Could you please elaborate your answer with a concrete code snippet and more description. – Mario Petrovic Nov 22 '21 at 23:32

C# How to reference default interface implementation in implementer class

1 Answers1