I can’t use SQL Server CE 4.0 as a data provider in Visual Studio, only 3.5, but it was installed, in machine.config I see SQL Server CE 4.0, but tokens of versions was equals. Help what need to do that i was able to use it in VS?
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See if installing SQL CE Tools for Visual Studio (direct download link) fixes that. The link was provided from this blog post by Scott Guthrie: