sql中的Tran和C#中的TransactionScope介绍

Begin TRY
    Begin Tran transaction
    
        DECLARE @ServiceOrderId INT 
        SET @ServiceOrderId=73342
        DECLARE @ErrorCount  INT 
        SET @ErrorCount = 0
        --调整积分通订单状态 支付完成
        UPDATE dbo.ServiceOrderNew
        SET OrderStatus = 2,UpdateDate = GETDATE()

        WHERE  ServiceOrderID = @ServiceOrderId


        --调整订单详细
        UPDATE dbo.ServiceOrderNewDetail
        SET DetailStatus = 2
        WHERE ServiceOrderID = @ServiceOrderId 

    Commit Tran transaction
    END TRY
        BEGIN CATCH
    ROLLBACK Tran transaction
END CATCH

DECLARE @ServiceOrderId INT 
SET @ServiceOrderId=73342
 
BEGIN TRAN  A
        DECLARE @ErrorCount  INT 
        SET @ErrorCount = 0
        --调整积分通订单状态 支付完成
        UPDATE dbo.ServiceOrderNew
        SET OrderStatus = 2,UpdateDate = GETDATE()
     
        WHERE  ServiceOrderID = @ServiceOrderId
        
        SET @ErrorCount=@ErrorCount+@@error

        --调整订单详细
        UPDATE dbo.ServiceOrderNewDetail
        SET DetailStatus = 2
        WHERE ServiceOrderID = @ServiceOrderId
       
        
        SET @ErrorCount=@ErrorCount+@@error
        --付款状态
        UPDATE dbo.ScorePayApply
        SET ApplyStatus = 2
        WHERE  ScorePayApplyID = (SELECT TOP 1 ScorePayApplyID FROM ServiceOrderNewDetail WHERE ServiceOrderID = @ServiceOrderId)
        
         SET @ErrorCount=@ErrorCount+@@error
       
         SET @ErrorCount=@ErrorCount+@@error
         
  IF @ErrorCount=0 
      BEGIN   
        COMMIT TRAN  A
      END 
  ELSE   
      BEGIN   
        ROLLBACK TRAN  A
      END 

 using (TransactionScope tran = new TransactionScope())
        {
            try
            {
                ServiceItemDataAccess.ServicesConfirmPayment(serviceOrderId, remark, serviceId);
                //提交事务
                tran.Complete();
            }
            catch (Exception ex)
            {
                return ex.ToString();
            }
            finally
            {
                tran.Dispose();
            }
        }