Hello Tomasz,

As for the ASP.NET webservice application, the exception handling mechanism
of it is quite different from ASP.NET web application. the
Application_Error event only works for web page application. For XML
Webservice, since all the unhandled exceptions in application are captured
and wrappered as a SoapException, also , this exception will be serialized
as a Soap <fault> element in SOAP message.  

#Handling and Throwing Exceptions in XML Web Services  
http://msdn2.microsoft.com/en-us/library/ds492xtk.aspx

If you want to add a global handler to intercept all the exceptions occured
in ASP.NET webservice, you may consider creating a custom soapExtension to
do the work.  Here is a good tech article detailedly discuss on this:

#User Friendly ASP.NET Exception Handling
http://www.codeproject.com/aspnet/ASPNETExceptionHandling.asp

If you have anything uncleaer on this, please feel free to let me know.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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