textBox number formating to 0000.00

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar >= '0' && e.KeyChar <= '9' || e.KeyChar == '.' && !textBox2.Text.Contains(".") || e.KeyChar == '\b')
    {
        if (textBox2.Text.Contains("."))
        {
            string[] txt = textBox2.Text.Split('.');

            if (txt[1].Length > 1)
            {
                if (e.KeyChar >= '0' && e.KeyChar <= '9')
                {
                    e.Handled = true;
                }
            }
        }
        else
        {
            e.Handled = false;
        }
    }
    else
    {
        e.Handled = true;
    }
}