Ok. Setting BinaryGUID=False in the connection does work. However, there are weveral bugs.
1. In the Server Explorer, if you edit advanced settings to set Binary Guid to False, it will generate "binary guid=False" instead of "BinaryGUID=False" 2. When generating LINQ Select queries and converting parameters into values, GUID fields will be converted into String no matter if BinaryGUID is True or False. For now I can work with Text values and BinaryGUID=False. Fixing the issue with long queries failing is a higher priority. Etienne