using System;

public enum Color /* : byte */
{
    White,       // Assigned a value of 0
    Red,         // Assigned a value of 1
    Green,       // Assigned a value of 2
    Blue,        // Assigned a value of 3
    Orange,      // Assigned a value of 4
}

public static class Program
{
    // we can also define the enum here inside the class
    // and then use it as Program.Color

    public static void Main()
    {
        // Create a variable of type Color and initialize it to Blue
        Color c = Color.Blue;
        Console.WriteLine(c);               // "Blue" (General format)
        Console.WriteLine(c.ToString());    // "Blue" (General format)
        Console.WriteLine(c.ToString("G")); // "Blue" (General format)
        Console.WriteLine(c.ToString("D")); // "3"    (Decimal format)
        Console.WriteLine(c.ToString("X")); // "03"   (Hex format)

        // Returns array of Color enums
        Color[] colors = (Color[])Enum.GetValues(typeof(Color));
        Console.WriteLine("Number of symbols defined: " + colors.Length);
        Console.WriteLine("Value\tSymbol\n-----\t------");
        foreach (Color color in colors)
        {
            // Display each symbol in Decimal and General format.
            Console.WriteLine("{0,5:D}\t{0:G}", color);
        }

        // Because Orange is defined as 4, 'c' is initialized to 4.
        c = (Color)Enum.Parse(typeof(Color), "orange", true);

        // Creates an instance of the Color enum with a value of 1
        c = (Color)Enum.Parse(typeof(Color), "1", false);

        // Creates an instance of the Color enum with a value of 23
        c = (Color)Enum.Parse(typeof(Color), "23", false);

        // Displays "True" because Color defines Red as 1
        Console.WriteLine(Enum.IsDefined(typeof(Color), 1));

        // Displays "True" because Color defines White as 0
        Console.WriteLine(Enum.IsDefined(typeof(Color), "White"));

        // Displays "False" because a case-sensitive check is performed 
        Console.WriteLine(Enum.IsDefined(typeof(Color), "white"));

        // Displays "False" because Color doesn’t have a symbol of value 10
        Console.WriteLine(Enum.IsDefined(typeof(Color), 10));

        int intColor = 3; // Blue
        Color enumColor;
        if (Enum.IsDefined(typeof(Color), (Color)intColor))
        {
            enumColor = (Color)intColor;
        }

        intColor = 547; // Not a defined color
        if (Enum.IsDefined(typeof(Color), (Color)intColor))
        {
            enumColor = (Color)intColor;
        }
    }
}