public void AddProject(string[] skills)
        {
            if (string.IsNullOrEmpty(Name) || Name[0] == ' ')
                throw new Exception("Name can't be empty or start from space");
            if (ProjectVM.Order == null)
                throw new Exception("Order was deleted");
            if (ReleaseDate < StartDate)
                throw new Exception("Release date can't be before stat date");
            ////if (Status == Project.Statuses.InProgress && SelectedLeader == null)
            ////{
            ////    throw new Exception("Module or project must contain leader");
            ////}
            if (_project == null)
            {
                _project.Name = Name;
                _project.Description = Description;
                _project.StartDate = StartDate;
                _project.ReleaseDate = ReleaseDate;
                _project.Order = ProjectVM.Order;
                _project.StatusType = Status;
                if (SelectedLeader != null)
                    _project.Leader = _selectedLeader.User;
                Project.Items.Add(_project);
                Project_Project p = new Project_Project()
                {
                    ParrentProject = _parentProject?.Project,
                    ChildProject = _project
                };
                Project_Project.Items.Add(p);

                foreach (var item in _savedPositions)
                {
                    Users_Project user_project = new Users_Project()
                    {
                        Position = item.Position,
                        Project = _project,
                        User = item.User
                    };

                    Users_Project.Items.Add(user_project);
                }


                foreach (var item in TeamsCollection)
                {
                    Team_Project.Items.Add(new Team_Project() { Project = _project, Team = item.Team });
                }

            }
            else
            {
                Guid id = _project.Id;
                Users_Project.Items.RemoveAll(item => item.Project.Id == id);
                Project_Project.Items.Remove(Project_Project.Items.FirstOrDefault(item => item.ChildProject.Id == _project.Id));
                Projects_Skill.Items.RemoveAll(item => item.Project.Id == id);
                Team_Project.Items.RemoveAll(item => item.Project.Id == _project.Id);
                Project.Items.Remove(Project.Items.FirstOrDefault(item => item.Id == _project.Id));
                _project = new Project();
                _project.Id = id;
                _project.Name = Name;
                _project.Description = Description;
                if (SelectedLeader != null && SelectedLeader.User != null)
                    _project.Leader = _selectedLeader.User;

                _project.StartDate = StartDate;
                _project.ReleaseDate = ReleaseDate;
                _project.Order = ProjectVM.Order;
                _project.StatusType = Status;

                Users_Project.Items.RemoveAll(item => item.Project.Id == id);
                foreach (var item in _savedPositions)
                {
                    Users_Project user_project = new Users_Project()
                    {
                        Position = item.Position,
                        Project = _project,
                        User = item.User
                    };

                    Users_Project.Items.Add(user_project);
                }

                Project.Items.Add(_project);
                Project_Project.Items.Add(new Project_Project() { ChildProject = _project, ParrentProject = _parentProject?.Project });


                foreach (var item in TeamsCollection)
                {
                    Team_Project.Items.Add(new Team_Project() { Project = _project, Team = item.Team });
                }
            }

            foreach (var item in skills)
            {
                Projects_Skill project_skill = new Projects_Skill()
                {
                    Project = _project,
                    Skill = Skill.Items.FirstOrDefault(skill => skill.Name == item)
                };

                Projects_Skill.Items.Add(project_skill);
            }



            LoadData();
            SaveButton = true;
        }
 public User_ProjectVM(Users_Project userProject)
 {
     _userProject = userProject;
 }