C#字符串操作 - 如何删除集合中每个连接字符串的第一个元素

只是不要在第一时间添加它？

foreach (ListViewItem HazPackErrItems in HazmatPackageErrorListview.Items)
    {
        string HazPackErrRow = " ";

        bool first = true;
        foreach (ListViewItem.ListViewSubItem HazPackErrSub in HazPackErrItems.SubItems)
        {
            if (first) 
                first = false;
            else
                HazPackErrRow += " " + HazPackErrSub.Text + ",";
        }
        // Remove comma after last element of string.
        HazPackErrRow = HazPackErrRow.Substring(0, HazPackErrRow.Length - 2); 
        MessageBox.Show(HazPackErrRow); // List concatenated subitems
    }