open text file in notepad
private void button1_Click(object sender, EventArgs e)
{
string filename = "license.txt";
if (!System.IO.File.Exists(filename))
System.IO.File.WriteAllText(filename, Properties.Resources.License);
// let windows decide which program it will use to open the file ...
// whatever registered application for .txt extension is on the user system
System.Diagnostics.Process.Start(filename);
// or explicitely open file in notepad
//System.Diagnostics.Process.Start("notepad.exe", filename);
}