private async void BtnPhones_Click(object sender, EventArgs e)
{
var db = new DataBase();
var phoneNumbers = new List <PhoneNumber>();
if (_group.Id != 0)
{
phoneNumbers = await db.PhoneNumbers.Where(d =>
!d.Deleted && d.GroupNode.Any(f => !f.Deleted && f.GroupId == _group.Id)).ToListAsync();
}
var phoneForm = new Phones(ref phoneNumbers, 0, 0, true);
phoneForm.ShowDialog();
_gotPhone = true;
_phoneNumbers = phoneNumbers;
}