static method cannot implement interface method, why?

Question

interface IXXX
{
    void Foo();
}

class XXX : IXXX
{
    public static void Foo()
    {
        Console.WriteLine(\"From XXX\");
    }
}


class Program 
{
    static          


        

Answer 1

An interface defines the behaviour that an object must respond to. As Foo is a static method, the object doesn't respond to it. In other words, you couldn't write...

XXX myXXX = new XXX();
myXXX.Foo();

In other words, myXXX doesn't fully satisfy the requirements of the interface.