[Serializable()]
public class InvalidDepartmentException : System.Exception
{
public InvalidDepartmentException() : base() { }
public InvalidDepartmentException(string message) : base(message) { }
public InvalidDepartmentException(string message, System.Exception inner):base(message,inner){}

// A constructor is needed for serialization when an
// exception propagates from a remoting server to the client. 
protected InvalidDepartmentException(System.Runtime.Serialization.SerializationInfo info,
    System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
}