You are stupid exception.

gistfile1.cs

/// <summary>
    /// The exception that is thrown when you are stupid.
    /// </summary>
    [Serializable]
    public class YouAreStupidException : Exception
    {
        // constructors...
        #region YouAreStupidException()
        /// <summary>
        /// Constructs a new YouAreStupidException.
        /// </summary>
        public YouAreStupidException() { }
        #endregion
        #region YouAreStupidException(string message)
        /// <summary>
        /// Constructs a new YouAreStupidException.
        /// </summary>
        /// <param name="message">The exception message</param>
        public YouAreStupidException(string message) : base(message) { }
        #endregion
        #region YouAreStupidException(string message, Exception innerException)
        /// <summary>
        /// Constructs a new YouAreStupidException.
        /// </summary>
        /// <param name="message">The exception message</param>
        /// <param name="innerException">The inner exception</param>
        public YouAreStupidException(string message, Exception innerException) : base(message, innerException) { }
        #endregion
        #region YouAreStupidException(SerializationInfo info, StreamingContext context)
        /// <summary>
        /// Serialization constructor.
        /// </summary>
        protected YouAreStupidException(SerializationInfo info, StreamingContext context) : base(info, context) { }
        #endregion
    }