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Unable to add Entity data model to a Visual Studio project

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Issue: Unable to add Entity data model to a Visual Studio project.
While adding the Entity data model to your Visual Studio project, you may get the following error message:

Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0,Profile=Client'

Error Dialog:
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Microsoft Visual Studio
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Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0,Profile=Client'. This can happen if the target framework is not installed or if the framework moniker is incorrectly formatted.
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OK
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This error message appears due to corruption of ADO.NET entity model. Apparently, the Entity data model is installed by the “ADONETEntityFrameworkTools_enu.msi”.

This installer for ADONETEntityFrameworkTools can be found at the location:

<path to Visual studio Disk>\WCU\EFTools\ADONETEntityFrameworkTools_enu.msi".

Resolution: To fix this issue:

#) Remove the ADO.NET entity model by using the msiexex /x ADONETEntityFrameworkTools_enu.msi

#) Reinstall it with the command line:
msiexec /i ADONETEntityFrameworkTools_enu.msi USING_EXUIH = 1.

 

Content by : Keshav Jain