There is already an open DataReader associated with this Command which must be closed first csharp

Code Example - There is already an open DataReader associated with this Command which must be closed first csharp

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