Disable Paste/Ctrl+v in C# textbox (Window based application)

Hi dear try this code,

private void textbox1_KeyPress(object sender, KeyPressEventArgs e)
       {
           if (e.KeyChar == 22)
               e.Handled = true;
         
        }

For disabling right click on your textbox:

Put a blank contextmenuestrip on your form and rename it for ex: mycontext, then set the Contextmenuestrip property of your text box in mycontext. User will not be able right click on your textbox.

For disabling copy and paste put this code on KeyDown Event handler of your textbox

private void textBox1_KeyDown(object sender, KeyEventArgs e)
  {
   if (e.Modifiers == Keys.Control)
   {
     e.Handled = true;
    textBox1.SelectionLength = 0;
   }
  }

Private Sub TxtPassword_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs)
           If e.Control And e.KeyCode = Key.V Then
               e.Handled = True
               e.SuppressKeyPress = True
           End If
           If e.Control And e.KeyCode = Key.C Then
               e.Handled = True
               e.SuppressKeyPress = True
           End If
       End Sub

Friend, please find the code for same also use the true block to generate your custom event.

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Control && e.KeyValue == 86)
    {
        e.Handled = true;
        e.SuppressKeyPress = true;

    }
}

please vote if this solution is accepted or relevant for you.

Thanks,
Ambesha