// Fig. 12.6: NegativeNumberException.cs
// NegativeNumberException represents exceptions caused by
// illegal operations performed on negative numbers.
using System;

namespace SquareRootTest
{
   class NegativeNumberException : ApplicationException
   {
      // default constructor
      public NegativeNumberException()
         : base( "Illegal operation for a negative number" )
      {
         // empty body
      } // end default constructor

      // constructor for customizing error message
      public NegativeNumberException( string messageValue )
         : base( messageValue )
      {
         // empty body
      } // end one-argument constructor

      // constructor for customizing the exception's error 
      // message and specifying the InnerException object
      public NegativeNumberException( string messageValue,
         Exception inner )
         : base( messageValue, inner )
      {
         // empty body
      } // end two-argument constructor
   } // end class NegativeNumberException
} // end namespace SquareRootTest

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