No, because you don't need that, as the ormsupportclasses is build on .NET 2.0 and .NET 3.5 uses the .net 2.0 CLR anyway, so you can use that debug build without problems. (the .NET 3.5 builds are grouped in that folder to illustrate that they're only for .NET 3.5 users as these assemblies require .net 3.5 to be present as they reference .net 3.5 specific assemblies)