private void toolStripButton1_Click(object sender, EventArgs e)
{
SuppliersForm suppliersForm = new SuppliersForm(suppliers);
suppliersForm.Show();
}
private void suppliersToolStripMenuItem_Click(object sender, EventArgs e)
{
SuppliersForm suppliersForm = new SuppliersForm(suppliers);
suppliersForm.Show();
}