c# – 为什么ReSharper建议删除自己的修复程序？

我正在使用此代码(来自MethodMan here)：

public static DataTable ExecuteDataSet(string sql,CommandType cmdType,params SqlParameter[] parameters)
{
    using (DataSet ds = new DataSet())
    using (SqlConnection connStr = new SqlConnection(UsageRptConstsAndUtils.CPSConnStr))
    using (SqlCommand cmd = new SqlCommand(sql,connStr))
    {
        cmd.CommandType = cmdType;
        foreach (var item in parameters)
        {
            cmd.Parameters.Add(item);
        }

        try
        {
            cmd.Connection.Open();
            new SqlDataAdapter(cmd).Fill(ds);
        }
        catch (SqlException ex)
        {
            throw;
        }
        return ds.Tables[0];
    }
}

当我有ReSharper Inspect>解决方案中的代码问题,它想知道“异常重新抛出可能意图”：

catch (SqlException ex)
{
    throw ex;
}

如果我接受ReSharper的建议修复(“rethrow exception”),Resharper将删除“ex”：

catch (SqlException ex)
{
    throw;
}

……但是,在接下来的检查中,它说,“catch子句是多余的”,并建议将其完全删除.

但是,当然,如果我删除catch块,它将无法编译(“预期捕获或最终”).我可以删除尝试…但是…如果我将其更改为：

catch (SqlException sqlex)
                {
                    for (int i = 0; i < sqlex.Errors.Count; i++)
                    {
                        var sqlexDetail = String.Format("From
ExecuteDataSet(),SQL Exception #{0}{1}Source: {2}{1}   
Number: {3}{1}State: {4}{1}Class: {5}{1}Server: {6}{1}Message: {7}
{1}Procedure: {8}{1}LineNumber: {9}",i + 1,// Users would get the fantods if they
saw #0
                            Environment.NewLine,sqlex.Errors[i].Source,sqlex.Errors[i].Number,sqlex.Errors[i].State,sqlex.Errors[i].Class,sqlex.Errors[i].Server,sqlex.Errors[i].Message,sqlex.Errors[i].Procedure,sqlex.Errors[i].LineNumber);
                        MessageBox.Show(sqlexDetail);
                    }
                }
                catch (Exception ex)
                {
                    String exDetail
String.Format(UsageRptConstsAndUtils.ExceptionFormatString,ex.Message,Environment.NewLine,ex.Source,ex.StackTrace);
                    MessageBox.Show(exDetail);
                }

… ReSharper的检查没有抱怨.