private void listBoxUsers_MouseDoubleClick(object sender, MouseEventArgs e)
{
AddingForm form = new AddingForm();
User user = users[listBoxUsers.SelectedIndex];
form.EditingMethod(user);
form.ShowDialog();
}
private void buttonAdd_Click(object sender, EventArgs e)
{
AddingForm form = new AddingForm();
form.ShowDialog();
}