/*

 "C:\Program Files (x86)\MSBuild\14.0\Bin\csc.exe" /out:IsNumericType.exe IsNumericType.cs && start "IsNumericType.exe" IsNumericType.exe

 IsNumeric(System.Boolean) -> False

 IsNumeric(System.String) -> False

 IsNumeric(System.Char) -> False

 IsNumeric(System.Byte) -> True

 IsNumeric(System.Byte[]) -> False

 IsNumeric(System.DateTime) -> False

 IsNumeric(System.Int32) -> True

 IsNumeric(System.Single) -> True

 IsNumeric(System.Decimal) -> True

 IsNumeric(System.DayOfWeek) -> True

 IsNumeric(System.Guid) -> False

 IsNumeric(System.IntPtr) -> False

 IsNumeric(System.Nullable`1[[System.Int32, mscorlib, Version=4.0.0.0, Culture=ne

 utral, PublicKeyToken=b77a5c561934e089]]) -> False

 IsNumeric(System.Action) -> False

 Press any key to EXIT...

 */

 using System;

 using System.Reflection;

 static class Program {

     static bool IsNumeric(Type type) {

         switch (Type.GetTypeCode(type)) {

             case TypeCode.Byte:

             case TypeCode.SByte:

             case TypeCode.UInt16:

             case TypeCode.UInt32:

             case TypeCode.UInt64:

             case TypeCode.Int16:

             case TypeCode.Int32:

             case TypeCode.Int64:

             case TypeCode.Decimal:

             case TypeCode.Double:

             case TypeCode.Single:

                 return true;

             default:

                 return false;

         }

     }

     public static void Main() {

         Test(typeof(bool));

         Test(typeof(string));

         Test(typeof(char));

         Test(typeof(byte));

         Test(typeof(byte[]));

         Test(typeof(DateTime));

         Test(typeof(int));

         Test(typeof(float));

         Test(typeof(Decimal));

         Test(typeof(DayOfWeek));

         Test(typeof(Guid));

         Test(typeof(IntPtr));

         Test(typeof(int?));

         Test(typeof(Action));

         Console.Write("Press any key to EXIT...");

         Console.ReadKey(true);

     }

     static void Test(Type type) {

         Console.WriteLine("IsNumeric({0}) -> {1}", type.FullName, IsNumeric(type));

     }

 }