public ExtensionMethods {
    public static string MyExtensionMethod(this string myString) {
        return "ranextension";
    }
}

// ....

// result = "didnotrun"
string myString = "asdf";
string result = myString.HasMethod("MyExtensionMethod") ? myString.MyExtensionMethod() : "didnotrun";

// Expected it to be "ranextension" but
// result = "didnotrun"
string result2 = typeof(ExtensionMethods).HasMethod("MyExtensionMethod") ? myString.MyExtensionMethod() : "didnotrun";