Uninstall EntityFramework using the Package Manager Console

Question

I\'m trying to re-install my EntityFramework package using

PM> Install-Package EntityFramework

But I get the following message

Answer 1

if you have the connection string with provider name on it . Then make sure the provider name have definition below as in the config (providers)(provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /)(/providers)