[csharp] bool IsNumeric(Type type)

/*
"C:Program Files (x86)MSBuild14.0Bincsc.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));
    }

}