How can I accept the backspace key in the keypress event?

Question

This is my code:

private void txtAdd_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!(char.IsLetter(e.KeyChar)) && !(char.IsNumber(e.KeyChar)         


        

Answer 1

You have to add !(char.IsControl(e.KeyChar)) in you sentence and that's it.

private void txtNombre_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!(char.IsLetter(e.KeyChar)) && !(char.IsNumber(e.KeyChar)) && !(char.IsControl(e.KeyChar)) && !(char.IsWhiteSpace(e.KeyChar)))
            {
                e.Handled = true;
            }
        }