New entry to this old post. I ran into problems writing targeting for .NET 4 Client Profile applications and the heavily used WPF DataGrid (generated dynamically at runtime). It works fine on .NET 4 until the program crashes, and sometimes it could not even run on XP and several windows 7 (especially in languages other than English). I checked the Fusion log and eventvwr, and .NET compatibility seems to be the reason.
I have been reluctant to postpone my application from .NET 4 to .NET 3.5 . But .NET 3.5 does not come with DataGrid , so I need to implement the WPF Toolkit . The DataGrid in the WPF Toolkit is a bit slower than I found, but it is more portable.
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