http://blogs.msdn.com/jstraumann/archive/2006/06/01/613302.aspx. NET Assemblies part Duex - Level 200 Hi all: A partner recently asked me how to pass a GUID to a .NET assembly called from worklow, so here's a simple example of how to do it. Workflow Assembliesen-USCommunityServer 2.1 SP1 (Build: 61025.2)