private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
Char ch = e.KeyChar;
validation v1 = new validation();
v1.validatedigitCharacters(ch, label11);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
char x = e.KeyChar;
validation v1 = new validation();
v1.validatedigitCharacters(x, label27);
}
private void quantity_KeyPress(object sender, KeyPressEventArgs e)
{
validation v1 = new validation();
char tt = e.KeyChar;
v1.validatedigitCharacters(tt, error);
}