C # WinForm Path selection and file read and write

Read file private void Readbtn_click (object sender, EventArgs e) {try {i                    F (Pathtxt.text = = "") {MessageBox.Show ("Please enter file address");                Return            } Readtxt.text = File.readalltext (Pathtxt.text, Encoding.default);//do not need to escape the "\" in the address}            catch (Exception ex) {MessageBox.Show ("File address Error");            }}//write file private void Writebtn_click (object sender, EventArgs e) { try {if (Pathtxt.text = = "") {MessageBox.Show ("Please enter file                    Address ");                Return                } file.writealltext (Pathtxt.text, Writetxt.text);            MessageBox.Show ("Success");            } catch (Exception ex) {MessageBox.Show ("File address Error"); }}//Read folder path       private void Folderbtn_click (object sender, EventArgs e) {if (Folderbrowserdialog1.showdialog ()            = = DialogResult.OK) {foldertxt.text = Folderbrowserdialog1.selectedpath; }}//read file path private void Filebtn_click (object sender, EventArgs e) {O            Penfiledialog op = new OpenFileDialog (); Op. Filter = "Text files (*.txt) |*.txt|            All Files (*. *) |*.* "; if (Op. ShowDialog () = = DialogResult.OK) {pathtxt.text = Op.            FileName; }        }