public void SaveDistribution()
        {
            List <Distribution> saveDistr = new List <Distribution>();

            foreach (DistributionVM dvm in sourceDistr)
            {
                Distribution dst = new Distribution(dvm.Id, dvm.ComputerID, dvm.NsName, dvm.UserID, dvm.UserFio);
                saveDistr.Add(dst);
            }

            var saveThread = Task.Factory.StartNew(() =>
            {
                core.SaveDistribution(saveDistr);
                AllSaved?.Invoke();
            });
        }