We are trying to create a Data Access Layer with minimal code in it. We pass a List of LINQ objects as parms to our web service methods. In order to get updates to work, I either had to use reflection or a deep clone technique to force the "identity manager service" (I think that's what it is called) to detect the changed fields. Ultimatley, the LINQ objects will be XML that will be processed by BizTalk. But my issue is now how to set a field to null. Apparently if a field value is null, the "identity
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