WinForms 3.5 DataGridView slower in Windows 7 than in Vista


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In any WinForms application that uses the DataGridView control (from .NET Framework 3.5), populating the datagrid programmatically (without databinding, didn't test how it behaves with bound items) is near-instantaneous in Vista. But in Windows 7 (x64 RC) the rows can be seen being drawn one by one from top. Has anyone else noticed this problem?

I am attaching a demo application that demonstrates this. It contains binaries made with both VS 2008 and VS 2010 Beta 1 targeting .NET Framework 3.5 as well as the sources for those who wouldn't run untrusted binaries.

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