This is my code:
private void txtAdd_KeyPress(object sender, KeyPressEventArgs e)
{
if (!(char.IsLetter(e.KeyChar)) && !(char.IsNumber(e.KeyChar)) && !(char.IsWhiteSpace(e.KeyChar)))
{
e.Handled = true;
}
}
It allows me to enter letters, numbers and spaces but it doesn't allow me to do backspace. Please help me.
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