I need to build the Constant Contact C# library against .net 3.5 because that is what we are currently using. When I switch to 3.5 and try to build I get the following error: The type or namespace name 'Json' does not exist in the namespace 'System.Runtime.Serialization' (are you missing an assembly reference?) It can no longer find JSON under System.Runtime.Serialization. What can I do to fix this? This is in the Component.cs and Extensions.cs file. Thanks Mike
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