When you implement two interfaces with the same method, how do you know which one is called?

Question

If you have TheMethod() in interfaces I1 and I2, and the following class

class TheClass : I1, I2
{
    void TheMethod()
}

If s

Answer 1

The real question is, "Who cares which interface it is using?" Really, it's not "using" the interface at all. It's using the implementation to fulfil the interface.