private void btnAddRenter_Click(object sender, EventArgs e)
{
AddRenter form = new AddRenter();
form.DataSource = Renters;
form.Token = this.Token;
form.Add_Callback += Add_Callback;
form.ShowDialog(this);
}
private void btnAdd_Click(object sender, EventArgs e)
{
AddRenter form = new AddRenter();
form.DataSource = dgvList.DataSource as List<Customer>;
form.Token = this.Token;
form.Add_Callback += Add_Callback;
form.ShowDialog(this);
this.Activate();
}