public static void Update(TreeGridProjectData value)
        {
            TreeGridProjectData result = DataList.Where(currentData => currentData.taskID == value.taskID).FirstOrDefault();

            if (result != null)
            {
                result.taskID    = value.taskID;
                result.taskName  = value.taskName;
                result.startDate = value.startDate;
                result.endDate   = value.endDate;
                result.duration  = value.duration;
                result.progress  = value.progress;
            }
        }
 public static void Insert(TreeGridProjectData value)
 {
     DataList.Insert(0, value);
 }