Array of Structures

Question

Hi, Am new to c# but i have good amount of experience using ColdFusion MX and ASP. I have written quite a number of components and webservices using ColdFusion MX and everything works fine. I am trying to use a webservice which returns xml as string data using c#. I am sending xml string to this method in the webservice. Problem is when i try to access this methods which also has a return type as xml string and my code breaks at this point and the dev. environment(Microsoft Visual C#.NET) says "An unhandled exception of type "System.NullReferenceException' occurred in Charp.exe." and it breaks there. Appreciate if anyone knows what's going wrong here. Thanks in advance, TKP I