TransactionalNodeService.NodeService.CreateDomainCommand C# (CSharp) Method

        protected SqlCommand CreateDomainCommand(out Guid newDomainId, out Guid newDomainNodeId, string domainOriginalId = default(string))
        {
            SqlCommand createDomainCommand = new SqlCommand();
            createDomainCommand.CommandText = "INSERT INTO [Domains] ([DomainUid], [DomainOriginalId]) VALUES (@DomainUid, @DomainOriginalId); INSERT INTO [Nodes] ([NodeUid], [NodeOriginalId], [NodeTypeUid], [DomainUid]) VALUES (@NodeUid, @DomainOriginalId, @DomainNodeTypeUid, @DomainUid)";
            createDomainCommand.Connection = Connection;

            newDomainId = Guid.NewGuid();
            newDomainNodeId = Guid.NewGuid();

            createDomainCommand.Parameters.AddWithValue("@DomainUid", newDomainId);
            createDomainCommand.Parameters.AddWithValue("@NodeUid", newDomainNodeId);
            createDomainCommand.Parameters.AddWithValue("@DomainNodeTypeUid", DomainNodeTypeId);

            if (domainOriginalId == default(string))
            {
                createDomainCommand.Parameters.AddWithValue("@DomainOriginalId", newDomainId.ToString());
            }
            else
            {
                createDomainCommand.Parameters.AddWithValue("@DomainOriginalId", domainOriginalId);
            }

            return createDomainCommand;
        }