public async Task <ObservableCollection <SingleService> > GetSingleServices(ServiceFilter filter)
{
filter.IsCourse = false;
var ret = new ObservableCollection <SingleService>();
foreach (var c in await Post <ServiceFilter, ObservableCollection <DtoService> >("GetServices", filter))
{
ret.Add(ServiceConverter.DtoToViewModelSingleService(c));
}
return(ret);
}