private void AddProject()
        {
            ManagerValidation MV = new ManagerValidation();
            bool correctForm     = MV.AddProjectValidation(ProjectMainTasks, ProjectResources, Name, Cost);

            bool tmp2 = checkWhichAreCyclicDependency();

            if (tmp2 && correctForm && Clients != null)
            {
                DateTime startProject = DateTime.Now;
                DateTime endProject;


                startProject = ProjectMainTasks[0].EarlyStart;
                endProject   = DateTime.Now;

                foreach (var mt in ProjectMainTasks)
                {
                    if (startProject.CompareTo(mt.EarlyStart) > 0)
                    {
                        startProject = mt.EarlyStart;
                    }

                    if (endProject.CompareTo(mt.LateFinish) < 0)
                    {
                        endProject = mt.LateFinish;
                    }
                }

                Project project = new Project()
                {
                    Name            = Name,
                    Cost            = Cost,
                    StartTime       = startProject,
                    EndTime         = endProject,
                    ClientID        = SelectedClient.ClientID,
                    TeamID          = Global.user.Team.TeamID,
                    ProjectStatusID = 1,
                };

                dbContext.Project.Add(project);
                dbContext.SaveChanges();

                //dodanie resources do projektu
                Project projectWithID = dbContext.Project.Where(x => x.Name == Name).FirstOrDefault();

                foreach (var r in ProjectResources)
                {
                    r.ProjectID = projectWithID.ProjectID;
                    dbContext.Resources.Add(r);
                    dbContext.SaveChanges();
                }


                //dodac najpier do kazdego main taska id projektu, potem zapisywa do bazy   CZY TO BEDZIE POTEM DOBRZE POWIAZANE?
                foreach (var r in ProjectMainTasks)
                {
                    r.ProjectID = projectWithID.ProjectID;
                }


                List <MainTask> calc        = new List <MainTask>();
                List <MainTask> tmpTaskList = new List <MainTask>(ProjectMainTasks);

                while (tmpTaskList.Count() != 0)
                {
                    foreach (MainTask task in tmpTaskList.ToList())
                    {
                        bool tmp = check(calc, task.PrecedingMainTasks.ToList());

                        if (tmp)
                        {
                            dbContext.MainTask.Add(task);
                            dbContext.SaveChanges();

                            calc.Add(task);
                            tmpTaskList.Remove(task);
                        }
                    }
                }

                //zerowanie zmiennych itp

                ErrorMessage er = new ErrorMessage("Add project!");
                er.ShowDialog();
            }
        }