Private void TestInput()
{
    Console.Write("Enter a character >\t");
    char ch = (char)Console.Read();
    Console.WriteLine("");

    if(Char.IsLetter(ch))
    {
        if(Char.IsUpper(ch))
        {
            Console.WriteLine("You have entered an upper case character");
        }
        else
        {
            Console.WriteLine("You have entered a lower case character");
        }
    }
    else if(Char.IsNumber(ch))
    {
        Console.WriteLine("You have entered a numeric character");
    }
    else
    {
        Console.WriteLine("You have entered a non alpha-numeric character");
    }

    Console.Read();
}