private void AddProject(object sender, RoutedEventArgs e)
        {
            string name = projName.Text;

            if (!string.IsNullOrEmpty(name))
            {
                Project p = new Project();
                p.PropertyChanged += ph.ItemChanged;
                p.ProjectName      = name;
                projName.Text      = "";
                ph.Projects.Add(p);
                projList.SelectedValue = p;
                ph.ItemChanged(null, null);
            }
        }