A CAPTCHA Control for ASP.NET 2

using System;

namespace SecureCaptcha.Security.Cryptography
{
    /// <summary>
    /// Provides methods for generating random texts.
    /// </summary>
    public static class RandomText
    {
        /// <summary>
        /// Generates an 8 letter random text.
        /// </summary>
        public static string Generate()
        {
            // Generate random text
            string s;
            Guid guid = Guid.NewGuid();

            s = guid.ToString().Substring(3, 4);

            return s;
        }
    }
}