private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.CheckFileExists = true;
open.CheckPathExists = true;
open.Filter = "Text files|*.txt|All files|*";
open.Title = "Open an alltext file.";
open.ShowDialog();
if (open.FileNames.Length < 1)
return;
stream = open.OpenFile();
}