<connectionStrings><br /> <add name=”IdentityConnection” connectionString=”Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\IdentityDb.mdf;Integrated Security=True;MultipleActiveResultSets=true;” providerName=”System.Data.SqlClient” /><br /> </connectionStrings>

Add this to your connection string:<br /> MultipleActiveResultSets=true;

This can happen if you execute a query while iterating over the results from another query. It is not clear from your example where this happens because the example is not complete.</p> <p>One thing that can cause this is lazy loading triggered when iterating over the results of some query.</p> <p>This can be easily solved by allowing MARS in your connection string. Add MultipleActiveResultSets=true to the provider part of your connection string (where Data Source, Initial Catalog, etc. are specified).