How do I catch the exception in windows application in c#?

Question

1. Where should we catch exception

   • In Layer Boundary (UI->BLL & BLL->DAL)
   • In that methods where there is no interaction between Layers only some business logic present
     
     

2. How do I write exception in Save/Delete where some DML statement executing?

   • What should I write in DAL end?
   • What should I write in BLL end?
   • What should I write in UI end?
     
     

3. In Get/Load method How do we handle exception

   • What should I write in BLL end?
   • What should I write in UI end?
     
     

4. Should I catch System exception?

Answer 1

The general rule with exception handling is: only handle exceptions your layer will be able to deal with. If you can't, let the higher ones handle it.