The ObjectMapper .NET Project

The TransactionAlreadyOpenException will always be thrown if you try to open an already open transaction a second time. In a simple example this exception can be forced with the following code.

            using (AdFactum.Data.ObjectMapper mapper = OBM.CreateMapper(Connection))

            {

                try

                {

                    mapper.BeginTransaction();

                    mapper.BeginTransaction(); // Second try causes the exception

                }

                catch(Exception)

                {

                    mapper.Commit();

                    throw;

                }

            }