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

See this thread from JoelOnSoftware describing the reasons behind this.

Basically the interface is the contract between the consumer and the provider, and a static method belongs to the class, and not each instance of the class as such.

An earlier question on SO also deal with the exact same question: Why Doesn't C# Allow Static Methods to Implement an Interface?