How to define an extension method in a scriptcs csx script

Question

I\'m playing with ScriptCS (which is awesome!) but I couldn\'t figure out how to define an extension method within a .csx script file.

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Answer 1

Good news! It is now supported in C# script files (.csx)

But you have to declare an extension method on top level:

static string MyToLowerExtension(this string str)
{
    return str.ToLower();
}

Do not declare it in a static class:

// this will not work!
public static class MyExtensionsClass
{
    static string MyToLowerExtension(this string str)
    {
        return str.ToLower();
    }
}