Question

Possible Duplicate:
Why Doesn’t C# Allow Static Methods to Implement an Interface?

I have code like this that says I can’t implement a static methods:

public static class AuxiliaryHelper : IAuxiliaryHelper
{
    /// <summary>
    /// Writes the response.
    /// </summary>
    /// <param name="jsonObj">The json object that gets turned in JSON and written out.</param>
    public static void WriteResponse(this object jsonObj)
    { ....

Can I get an interface for this?

Answer 1

Short answer: No.

Longer answer:

This concept doesn’t really make any sense. The point of an interface is to define a base type that describes a contract for various implementations. I can declare a variable using a static type of IFoo, which tells the compiler I don’t know what type this will be at runtime, but I assure you it will have a certain set of methods. – Thus, the compiler will let you call those methods, which will be resolved at runtime.

A static method is always bound to one and only one class, so there’s no instance to refer to.