using System.Windows.Forms;
public class SimpleEditForm : System.Windows.Forms.Form
private System.Windows.Forms.MenuItem mnuFile;
private System.Windows.Forms.MenuItem mnuOpen;
private System.Windows.Forms.MenuItem mnuSave;
private System.Windows.Forms.MenuItem mnuExit;
private System.Windows.Forms.RichTextBox rtDoc;
private void mnuOpen_Click(object sender, System.EventArgs e)
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "Rich Text Files (*.rtf)|*.RTF|" +
dlg.CheckFileExists = true;
dlg.InitialDirectory = Application.StartupPath;
if (dlg.ShowDialog() == DialogResult.OK)
rtDoc.LoadFile(dlg.FileName);
private void mnuSave_Click(object sender, System.EventArgs e)
SaveFileDialog dlg = new SaveFileDialog();
dlg.Filter = "RichText Files (*.rtf)|*.RTF|Text Files (*.txt)|
dlg.CheckFileExists = true;
dlg.InitialDirectory = Application.StartupPath;
if (dlg.ShowDialog() == DialogResult.OK)
rtDoc.SaveFile(dlg.FileName);
private void mnuExit_Click(object sender, System.EventArgs e)