http://blogs.msdn.com/b/joncole/archive/2009/09/21/impersonation-code-in-c.aspxWhile investigating a customer issue, I needed code to impersonate a different user on the current thread. A quick search of the msdn blogs turned up this post , which got me most of the way there. I decided to wrap the code into a class that inheritsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/joncole/archive/2009/09/21/impersonation-code-in-c.aspx#9897762Tue, 22 Sep 2009 01:04:33 GMT91d46819-8472-40ad-a661-2c78acb4018c:9897762JonCole<P>Gareth,</P> <P>I believe you are right about the SuppressFinalize call. &nbsp;I pounded this code out pretty quickly and didn't consider that fact. &nbsp;I have removed the unnecssary code.&nbsp; Thanks for the comment.</P><div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9897762" width="1" height="1">http://blogs.msdn.com/b/joncole/archive/2009/09/21/impersonation-code-in-c.aspx#9897742Mon, 21 Sep 2009 23:56:29 GMT91d46819-8472-40ad-a661-2c78acb4018c:9897742Gareth<P>Would I be right in saying that as the ImpersonatedUser class does not have a finalizer there is no pint in calling "GC.SuppressFinalize(this);"? And there would be no point in adding a finalizer as it would run on a different thread?</P><div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9897742" width="1" height="1">