public List<Group> GetAllGroupsList()
{
return AdminOfGroups.Select(a => a.Group)
.Concat(Participate.Select(gu => gu.Group))
.Concat(SubscribesToGroups.Select(gu => gu.Group)).ToList();
}
public List<Group> GetGroupsAdminList()
{
return AdminOfGroups.Select(a => a.Group).ToList();
}