public IEnumerable <ParentTaskModel> Get() { TaskManagerRepository parentTaskRep = new TaskManagerRepository(); var allParentTask = parentTaskRep.GetAllParentTasksRepo().ToList(); var allChildTask = parentTaskRep.GetAllTaskRepo().ToList(); Parent_Task_Tbl newParent = new Parent_Task_Tbl { Task_Tbl = allChildTask, }; allParentTask.Add(newParent); return(allParentTask.Select(p => _modelFactory.GetParentTaskMoDel(p))); }