private void AddUserButton_Click(object sender, EventArgs e)
{
UsersListForm users_list = new UsersListForm(client.GetUsersList().Data.Split(' ')
.Where(u => !UserList.Items.Contains(u)).ToArray());
users_list.ShowDialog();
if (users_list.SelectedUser != null)
{
ActionResult res = client.AddUserToContacts(users_list.SelectedUser);
if (res.Result)
{
UserList.Items.Add(users_list.SelectedUser);
}
else
{
MessageBox.Show(ErrorMessages.ERR_UNDEFINED_RESPONSE, ErrorMessages.ERR_ERROR,
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}