how a derived class may override an existing enumeration in a base class

   
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

//
//  BaseEnum.cs - Demonstrates how a derived class may override an existing
//                enumeration in a base class
//
//             Compile this program with the following command line:
//                 C:>csc baseenum.cs
//
namespace nsEnum
{
    using System;
    public class clsBaseClass
    {
//  Define the enum type
        public enum Weekdays
        {
                Sun, Mon, Tues, Wed, Thurs, Fri, Sat
        }
        static public void Main ()
        {
            Console.WriteLine ("In base class, Sunday = " +
                               (int) Weekdays.Sun);
            clsNewClass second = new clsNewClass();
            second.ShowEnum ();
        }
    }
    class clsNewClass : clsBaseClass
    {
        public new enum Weekdays
        {
                Sun = 1, Mon, Tues, Wed, Thurs, Fri, Sat
        }
        public void ShowEnum()
        {
//  Use the class name with the enum name
            Console.WriteLine ("In derived class, Sunday = " +
                               (int) Weekdays.Sun);
        }
    }
}

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how a derived class may override an existing enumeration in a base class : Enum « Data Types « C# / C Sharp

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