Save File As Text Format Or In RTF Format...

It Will Open Save Dialog Box & Then You Can Save Your Content Which You Written In Richtextbox At Your Location...

string filename=null;   //On The Save Button's Click Event... private void btnLoad_Click(System.Object sender, System.EventArgs e) { if (SaveFileDialog1.ShowDialog == DialogResult.OK)        {               //Store The Filename Into Variable...               filename = SaveFileDialog1.FileName;               //Save File...               RichTextBox1.SaveFile(filename); } }