private void OpenUser()
        {
            UIUser u = new UIUser((BussinessLogic.Users) this.listBox_Users.SelectedItem);

            u.Show();
            this.Close();
        }
 private void OpenUser()
 {
     UIUser u = new UIUser((BussinessLogic.Users)this.listBox_Users.SelectedItem);
     u.Show();
     this.Close();
 }
 private void addUserToolStripMenuItem_Click(object sender, EventArgs e)
 {
     UIUser user = new UIUser();
     user.ShowDialog();
 }