用户 'sa' 登录失败。
System.Data.SqlClient.SqlException: 用户 'sa' 登录失败。
  在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
  在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
  在 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
  在 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK)
  在 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject)
  在 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
  在 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
  在 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
  在 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
  在 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
  在 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
  在 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
  在 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
  在 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
  在 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
  在 System.Data.SqlClient.SqlConnection.Open()
  在 System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user)
  在 System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe()
  在 System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode()
  在 System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
  在 System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
  在 System.Linq.Queryable.Count[TSource](IQueryable`1 source)


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