Never mind, i figured it out:
Code:
OpenFileDialog dlg= new OpenFileDialog();
dlg.Filter="Half-Life exe (*.exe)|*.exe";
dlg.InitialDirectory=@"C:\Program Files\Steam\Steamapps";
if(dlg.ShowDialog()==DialogResult.OK)
{
string path=dlg.FileName;
const string _directpath=@"C:\Documents and settings\all users\BSP Config\";
path=Path.GetDirectoryName(path);
DirectoryInfo parent=Directory.GetParent(path);
textBox3.Text = parent.FullName;
if(Directory.Exists(_directpath)==false)
{
DirectoryInfo dir= Directory.CreateDirectory(_directpath);
}
StreamWriter file=new StreamWriter(@"C:\Documents and settings\all users\BSP config\steam.cfg");
string filein=textBox3.Text;
file.WriteLine(filein+"\\");
file.Close();
}