C# Winform textBox 只允许输入数字

private void textBox1_KeyPress(object sender,KeyPressEventArgs e)
{
//数字0~9所对应的keychar为48~57
e.Handled = true;
//输入0-9
if ((e.KeyChar >= 47 && e.KeyChar <= 58) || e.KeyChar == 8)
{
e.Handled = false;
}
}