private void fornecedoresToolStripMenuItem_Click(object sender, EventArgs e)
        {
            var frmfornecedor = new FrmFornecedor();

            frmfornecedor.MdiParent = this;
            frmfornecedor.Show();
        }
 private void fornecedoresToolStripMenuItem_Click(object sender, EventArgs e)
 {
     var frmfornecedor = new FrmFornecedor();
     frmfornecedor.MdiParent = this;
     frmfornecedor.Show();
 }