Throw Vs Throw ex

Throw	Throw Ex
try{         // do some operation that can fail    }    catch (Exception ex)    {         // do some local cleanup         throw;    }	try    {         // do some operation that can fail    }    catch (Exception ex)    {         // do some local cleanup         throw ex;    }
It preserve the Stack information with Exception	It Won't Send Stack information with Exception
This is called as "Rethrow"	This is called as "Breaking the Stack"
If want to throw new exception, throw new ApplicationException("operation failed!");	If want to throw new exception, throw new ApplicationException("operation failed!",ex);