Entity Framework version error in config file

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C#

Silverlight

errors

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While I try to build the silverlight application,facing some errors. I googled a lot but i could'nt end up with the solution so please help me

Error 1:

Error	11	The type 'System.Data.Entity.DbContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

I tried to change the version in my app.config file.
Even after changing this error persist.

Error 2:

Error	7	Error 175: The specified store provider cannot be found in the configuration, or is not valid.

With regards
R.K.