A way to check if a type is numeric in C#

Numeric.cs

using System;

namespace ch.cimnine.Util
{
    public sealed class Numeric
    {
        /// <summary>
        /// Determines if a type is numeric.  Nullable numeric types are considered numeric.
        /// </summary>
        /// <remarks>
        /// Boolean is not considered numeric.
        /// </remarks>
        public static bool Is(Type type)
        {
            if (type == null) return false;

            // from http://stackoverflow.com/a/5182747/172132
            switch (Type.GetTypeCode(type))
            {
                case TypeCode.Byte:
                case TypeCode.Decimal:
                case TypeCode.Double:
                case TypeCode.Int16:
                case TypeCode.Int32:
                case TypeCode.Int64:
                case TypeCode.SByte:
                case TypeCode.Single:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64:
                    return true;
                case TypeCode.Object:
                    if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
                    {
                        return Is(Nullable.GetUnderlyingType(type));
                    }
                    return false;
            }
            return false;
        }

        /// <summary>
        /// Determines if a type is numeric.  Nullable numeric types are considered numeric.
        /// </summary>
        /// <remarks>
        /// Boolean is not considered numeric.
        /// </remarks>
        public static bool Is<T>()
        {
            return Is(typeof(T));
        }
    }
}