http://developers.de/blogs/damir_dobric/archive/2010/01/26/error-while-mergingdictionaries-in-silverlight.aspxIn my SIlverlight application I used following code to perform the merge of Resources which are stored in some dedicated assembly designed for this purpose. For this reason I used following code: ResourceDictionary dict = new ResourceDictionary (); stringenCommunityServer 2008 SP1 (Build: 30619.63)