How can I allow ctrl+a with TextBox in winform?

Question

I\'m asking the question already asked (and even answered) here: Why are some textboxes not accepting Control + A shortcut to select all by default

But that answer d

Answer 1

This is my code, it is working fine

private void mainSimPlus_KeyDown(object sender, KeyEventArgs e)
            {
                e.Handled = true;
                if (e.Control == true && e.KeyCode == Keys.A)
                {
                    if (SelectAllTextBox(txt1))
                        return;
                    if (SelectAllTextBox(txt2))
                        return;
                }
            }
            private bool SelectAllTextBox(TextBox txt)
            {
                if (txt.Focused)
                {
                    txt.SelectAll();
                    return true;
                }
                else
                    return false;
            }