// PUT: api/Books/5
 public bool Put(std_Crs b)
 {
     try
     {
         return(unitOfWork.StdCrsManager.UpdateEntity(b));
     }
     catch
     {
         return(false);
     }
 }
 // POST: api/Books
 public bool Post(std_Crs b)
 {
     try
     {
         var id = unitOfWork.StdCrsManager.MaxId(b);
         for (int i = 0; true; i++)
         {
             if (unitOfWork.StdCrsManager.GetByID(id) == null)
             {
                 b.id = id;
                 return(unitOfWork.StdCrsManager.AddEntity(b));
             }
             id++;
         }
     }
     catch
     {
         return(false);
     }
 }