无法将[A] System.Data.SQLite.SQLiteConnection强制转换为[B] System.Data.SQLite.SQLiteConnection

System.data.sqlite

[A]System.Data.SQLite.SQLiteConnection cannot be cast to [B]System.Data.SQLite.SQLiteConnection...

gacutil

[A]System.Data.SQLite.SQLiteConnection cannot be cast to [B]System.Data.SQLite.SQLiteConnection.  
Type A originates from \'System.Data.SQLite, Version=1.0.66.0.  Culture=neutral, PublicKey Token=db937bc2d44ff139\' 
in the context \'Default\' at location \'C:\\Program Files\\ultracorp\\System.... [yes, ellipses are the best I have right here, I know...]


Server stack trace: 
   at System.Data.SQLite.SQLiteCommand.set_DbConnection(DbConnection value)
   at System.Data.Common.DbCommand.set_Connection(DbConnection value)
   at System.Data.Common.Utils.CommandHelper.SetStoreProviderCommandState(EntityCommand entityCommand, EntityTransaction entityTransaction, DbCommand storeProviderCommand)
   at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
   at System.Data.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues)
   at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__1[TResult](IEnumerable`1 sequence)
   at System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
   at System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression)
   at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
   at UltraCorp.DataWrangler.Models.WidgetsTable.getWidget(WidgetsEntities dbConn)
   at UltraCorp.DataWrangler.Models.WidgetsTable.getWidget()
   at UltraCorp.DataWrangler.Models.WidgetsTable.getUser()
   at UltraCorp.DataWrangler.Infrastructure.DataWranglerTray.getUser()
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg, Int32 methodPtr, Boolean fExecuteInContext)

provider=System.Data.SQLite;