public IActionResult GetDocument(int id)
 {
     if (id.ToString()[0] == '1')
     {
         return(Ok(new { Document = DocumentManager.GetArtPiece(id), Type = "Art Piece", Id = DocumentManager.GetArtPiece(id).ArtPieceId }));
     }
     else if (id.ToString()[0] == '2')
     {
         return(Ok(new { Document = DocumentManager.GetPoem(id), Type = "Poem", Id = DocumentManager.GetPoem(id).PoemId }));
     }
     else if (id.ToString()[0] == '3')
     {
         return(Ok(new { Document = DocumentManager.GetWritingAssignment(id), Type = "Writing Assignment", Id = DocumentManager.GetWritingAssignment(id).WritingAssignmentId }));
     }
     else if (id.ToString()[0] == '5')
     {
         return(Ok(new { Document = DocumentManager.GetLessonPlan(id), Type = "Lesson Plan", Id = DocumentManager.GetLessonPlan(id).LessonPlanId }));
     }
     return(NotFound());
 }