How do i Handle right click mouse in richTextBox in c#

private void richTextBox1_MouseDown(object sender, MouseEventArgs e)
 {
     if (e.Button == System.Windows.Forms.MouseButtons.Right)
     {
         MessageBox.Show("you got it!");
     }

 }

This is the solution.

void mousecontrol_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
{
FrameworkElement modeitem = e.OriginalSource as FrameworkElement;

ContextMenu modemenu = new ContextMenu();

clipboard_object = sender as System.Windows.Controls.ContentControl;
clipboard_status = false;
clipboard_type = clipboard_object.GetType();

modeitem.ContextMenu = modemenu;

MenuItem men1 = new MenuItem();
MenuItem men2 = new MenuItem();
MenuItem men3 = new MenuItem();
MenuItem men4 = new MenuItem();
MenuItem men5 = new MenuItem();
MenuItem men6 = new MenuItem();
MenuItem men7 = new MenuItem();
MenuItem men8 = new MenuItem();
MenuItem men9 = new MenuItem();
MenuItem men10 = new MenuItem();
MenuItem men11 = new MenuItem();
MenuItem men12 = new MenuItem();

men1.Header = "Cut";
men2.Header = "Copy";
men3.Header = "Paste";
men4.Header = "Delete";
men5.Header = "Protect";
men6.Header = "Delete Reference";
men7.Header = "Object Sequence";
men8.Header = "Visibility";
men9.Header = "Insert Interaction";
men10.Header = "Group";
men11.Header = "Align Object";
men12.Header = "Insert Text";

MenuItem men5_men1 = new MenuItem();
MenuItem men5_men2 = new MenuItem();
MenuItem men5_men3 = new MenuItem();
MenuItem men5_men4 = new MenuItem();

men5_men1.Header = "Presentation Mode";
men5_men2.Header = "Video Mode";
men5_men3.Header = "Practise Mode";
men5_men4.Header = "Assessment Mode";

men5_men1.IsChecked = true;
men5_men2.IsChecked = false;
men5_men3.IsChecked = true;
men5_men4.IsChecked = false;

// men1.Click += men1_Click;
// men2.Click += men2_Click;
// men3.Click += men3_Click;
// men4.Click += men4_Click;
modemenu.Items.Add(men1);
modemenu.Items.Add(men2);
modemenu.Items.Add(men3);
modemenu.Items.Add(men4);
modemenu.Items.Add(men5);
modemenu.Items.Add(men6);
modemenu.Items.Add(men7);
modemenu.Items.Add(men8);
modemenu.Items.Add(men9);
modemenu.Items.Add(men10);
modemenu.Items.Add(men11);
modemenu.Items.Add(men12);

men5.Items.Add(men5_men1);
men5.Items.Add(men5_men2);
men5.Items.Add(men5_men3);
men5.Items.Add(men5_men4);


}