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Q: 

Data components in Visual Studio are disabled, how to enable them?

I am trying to make a WPF application with a SQL Server CE database. I am following the tutorial SQL Server 2005 Compact Edition Data Access with the SqlCeResultSet and Visual C#.NET, but in my Visual Studio 2010, all components under the Data-section of the Toolbox are disabled.

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Why are my Data components disabled? And how can I enable them?

The tutorial isn't using WPF, so I don't know if that is the reason. If that is the reason, is there any alternative way to use the same components in WPF?

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