Regarding Components

When we use components in our application, exceptions not handled at each component but at a specific section. Exception
occurred at component is thrown to next layer to next and finaly handled.

  We handle exception in following in ways:

   Create a class called MyException inheriting Exception class

public class MyException:Exception
    {
       public MyException(string msg)
           : base(msg)
       {
       }
    }

   We wil use above class to handle exception flow from components to fnal layer we handle exception

   Layer 3:
             try{}
             catch(exception ex){ throw MyException(ex.tosting());}

   Layer 2:
             try{}
             catch(exception ex){ throw MyException(ex.tosting());}

   Layer 1:
             try{}
             catch(exception ex){ //error handled here by creating errorlog or insert error details to database}