Help, writing and opening a text file.

i think you forgot a HMNSFile.Flush() after the WriteLine

when I'm running my program and press the button above it stops on the first line of code.

I actually wanted to have the txt file open up in notepad and have the info by just click a button in my program. private void button3_Click(object sender, System.EventArgs e) { FileStream infile = File.Open("binary.dat", FileMode.Open); BinaryReader reader = new BinaryReader(infile); FileStream outfile = File.Open("list.txt", FileMode.CreateNew); StreamWriter writer = new StreamWriter(outfile); int HMSNRecordNo = Int32.Parse(HMSNIDtextBox.Text); writer.WriteLine("ID# "); string Out; for (int i = 0; i < HMSNNUMBERS_OF_RECORDS; i++) { writer.Write( HMSNRecordNo ); } outfile.Close(); DialogResult r = MessageBox.Show("Open file in Notepad?", MessageBoxButtons.OK); if (r.Okay) { System.Diagnostics.Process.Start("notepad.exe", "list.txt"); } }

Looks like you just forgot to close the stream when you were done. fs.Close(). Reading can be done with the StreamReader and reopening the file stream. if you want to read/write while the file is open, you can probably just attach your existing file stream to the StreamReader and use it to read. Still, you'll need to close the stream ;) -Mike