http://developers.de/blogs/damir_dobric/archive/2010/04/22/silverlight-4-invalidoperationexception-securityexception-wcf-dataservices.aspxWhen migrating Silverlight 3 Project to Silverlight 4 you might experience following exception: InvalidOperationException (InnerException: SecurityException) This error occurs when the SIlverlight application has been downloaded from one site like httpenCommunityServer 2008 SP1 (Build: 30619.63)http://developers.de/blogs/damir_dobric/archive/2010/04/22/silverlight-4-invalidoperationexception-securityexception-wcf-dataservices.aspx#221074Thu, 10 Nov 2011 06:52:35 GMT7e491611-45ad-4dae-a68f-c4cb64439510:221074Kirikamal<p>Hi,</p> <p>I&#39;m looking for this.. now my app working nicely...</p> <p>Thank you.</p> <p>- Kirikamal</p> <div style="clear:both;"></div><img src="http://developers.de/aggbug.aspx?PostID=221074" width="1" height="1">http://developers.de/blogs/damir_dobric/archive/2010/04/22/silverlight-4-invalidoperationexception-securityexception-wcf-dataservices.aspx#221098Thu, 03 Feb 2011 08:58:50 GMT7e491611-45ad-4dae-a68f-c4cb64439510:221098Worked GREAT!!!<p>After near a month of strugglin with that error, I found that I missed this xml file...</p> <p>Thanks A LOT!</p> <div style="clear:both;"></div><img src="http://developers.de/aggbug.aspx?PostID=221098" width="1" height="1">