A convenience method that inverts IsAssignableFrom to be semantically more straightforward.

IsAssignableTo.cs

        /// <summary>
        /// A convenience method that inverts <see cref="IsAssignableFrom"/> to be
        /// semantically more straightforward.
        /// </summary>
        public static bool IsAssignableTo(this Type source, Type target)
        {
            return target.IsAssignableFrom(source);
        }