c# - File I/O Save File -

i'm doing basic read/write class of examples i've found console input.

i figured out how write file using text box , open needed file.

i'm having trouble writing file on open file path usual save option since other uses savefiledialog. i'm assuming it's not hard cannot seem fine resources.

i've attached open , save code have.

private void mnuopen_click(object sender, eventargs e) {     //promps file dialog open text file     openfiledialog dlgopen = new openfiledialog();     dlgopen.filter = "all files|*.*|text files|*.txt*";     dlgopen.multiselect = false;     if (dlgopen.showdialog() == dialogresult.ok)     {         openfile(dlgopen.filename);     } }  public void openfile(string filepath) {     //class reads opened file     streamreader reader = null;      try     {         //messagebox.show(filepath)         reader = new streamreader(filepath);         txtbody.text = reader.readtoend();         stafilepath.text = filepath;         stadatetime.text = datetime.now.toshorttimestring();     }     catch(exception ex)     {         messagebox.show(ex.message);     }         {         if (reader != null) reader.close();     } }  private void newtoolstripmenuitem_click(object sender, eventargs e) {     //new button clicked clears text     txtbody.text = string.empty; }  private void mnusaveas_click(object sender, eventargs e) {     //when save menu button clicked prompt pops , asked save new file     savefiledialog dlgsave = new savefiledialog();     dlgsave.filter = "all files|*.*|text files|*.txt*";     if (dlgsave.showdialog() == dialogresult.ok)     {         savefile(dlgsave.filename);     } } public void savefile(string filepath) {     //writes on file selected     streamwriter writer = null;      try     {         writer = new streamwriter(filepath);         writer.write(txtbody.text);         stafilepath.text = filepath;         stadatetime.text = datetime.now.toshorttimestring();         messagebox.show("file saved!");     }     catch(exception ex)     {         messagebox.show(ex.message);     }         {         if (writer != null) writer.close();     } }  private void mnusave_click(object sender, eventargs e) {     //saves open file in text box unless not exist file path yet }