Difficult question

[andredani]

Dictionary list = new Dictionary(); String nameAndJob, Job, line, name; Int32 pages; ListViewItem item1; foreach (ListViewItem lvi in listView2.Items) { nameAndJob = string.Concat(lvi.SubItems[0].Text); if (!list.ContainsKey(nameAndJob)) list.Add(nameAndJob, lvi); Job = string.Concat(lvi.SubItems[1].Text); if (!list.ContainsKey(Job)) list.Add(Job, lvi); } using (StreamReader sr = new StreamReader(path1 + "/personalpr.txt")) { while (sr.Peek() > 0) { line = sr.ReadLine(); if (line == "#") { name = sr.ReadLine(); nameAndJob = string.Concat(name); Job = string.Concat(name); if (list.ContainsKey(nameAndJob)) { item1 = list[nameAndJob]; item1 = list[Job]; item1.SubItems[1].Text = sr.ReadLine(); item1.SubItems[3].Text = sr.ReadLine(); item1.SubItems[5].Text = sr.ReadLine(); } int result = 0; foreach (ListViewItem lvi in listView2.Items) { result += int.Parse(lvi.SubItems[2].ToString()) - int.Parse(lvi.SubItems[3].ToString()); ????????????????????:mad: ////I want to calculate lvi.subitems[2] - lvi.subitems[3] and pass the result to subitems[3].:mad: } item1.SubItems[3] = result.ToString();???????:mad: } } } } Can i delete this readline from .txt file after this use??? and how?? Thanks all!! :):-D;):laugh:

[pmarfleet]

As you are reading the input file, you should generate a corresponding output file. Copy only the data you want to keep from the input file to the output file. When you have finished reading the input file, overwrite it with the output file. aul