First create a project for a Windows Forms application in Visual Studio.

Then open the Form1.cs GUI file and make the design with one MenuStrip, two TextBoxes and a Label and drag an openfileDialog, saveFileDialog, folderBrowserDialog, colorDialog and fontDialogs). Make one Menu as in the following:

Dialog Box

Now we move to the code.

openFileDialog Click Event

  1. private void openDialogToolStripMenuItem_Click(object sender, EventArgs e)
  2. {
  3. openFileDialog1.Filter = "Text file (*.txt)|*.txt|All file(*.*)|*.*";
  4. if (openFileDialog1.ShowDialog() == DialogResult.OK)
  5. {
  6. stropen = openFileDialog1.FileName;
  7. textBox1.Text = System.IO.File.ReadAllText(stropen);
  8. }
  9. }
Create Project Windows Form Application

saveFileDialog Click Event

Write text in the TextBox area and then click on the Save menu option.
  1. private void saveDialogToolStripMenuItem_Click(object sender, EventArgs e)
  2. {
  3. saveFileDialog1.Filter = "Text file (*.txt)|*.txt|All file(*.*)|*.*";
  4. if (saveFileDialog1.ShowDialog() == DialogResult.OK)
  5. {
  6. strsave = saveFileDialog1.FileName;
  7. System.IO.File.WriteAllText(strsave, textBox1.Text);
  8. }
  9. }
openFileDialog

fontDialog Click Event
  1. private void fontDialogToolStripMenuItem_Click(object sender, EventArgs e)
  2. {
  3. if (fontDialog1.ShowDialog() == DialogResult.OK)
  4. {
  5. textBox1.Font = fontDialog1.Font;
  6. textBox1.ForeColor = fontDialog1.Color;
  8. }
  9. }
saveFileDialog

colorDialog Click Event
  1. private void colorDialogToolStripMenuItem_Click(object sender, EventArgs e)
  2. {
  3. if (colorDialog1.ShowDialog() == DialogResult.OK)
  4. {
  5. //this.BackColor = colorDialog1.Color;
  6. //menuStrip1.BackColor = colorDialog1.Color;
  7. textBox1.BackColor = colorDialog1.Color;
  8. }
  9. }
fontDialog

browserDialog Click Event
  1. private void browseDialogToolStripMenuItem_Click(object sender, EventArgs e)
  2. {
  3. folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Desktop;
  4. if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
  5. {
  6. textBox2.Text = folderBrowserDialog1.SelectedPath;
  7. }
  8. }
browserDialog

Thank you.