using (TransactionScope scope = new TransactionScope())

{

      //操作1

      XXEntities.Current.SaveChanges();

      //操作2

      XXEntities.Current.SaveChanges();

      //其他Context操作

      XXEntities2.Current.SaveChanges();

      scope.Complete();

      BoshccEntities.Current.AcceptAllChanges();

}

XXEntities.Current.Connection.Open();

using (var tran = XXEntities.Current.Connection.BeginTransaction())

{

      try

      {

            //....

            XXEntities.Current.SaveChanges();

            tran.Commit();

      }

      catch (Exception ex)

      {

            tran.Rollback();

            throw ex;

      }

      finally

      {

            XXEntities.Current.Connection.Close();

            tran.Dispose();

      }
}