Question

I have a block of code inside a try catch block (c#). The block of code can throw two exceptions (ArgumentException/NullRefernceException).

try
{
    //Code
}
catch(NullRefernceException Ex)
{
   //Error Handling Code
}
catch(ArgumentException Ex)
{
  //Error Handling code
}

The error handling code is the same in both the Exceptions. So can i keep the error handling code in ArgumentException catch block and upon NullRefernceException can i throw ArgumentException since i have a catch block follwing it. Not sure whether it will work and does it have any harm on the performance and whether it is a good programming practice.

Am i left with no option but either to have the same code in both the catch blocks or to have a separate method holding the error handling code?

I don’t want to keep the error handling code in a separate method and invoke.

Answer 1

Maybe you can

try
{

}
catch(Exception ex)
{
   if (ex is NullRefernceException || ex is ArgumentException)
   {
     //do something
   } 
   else 
   {
      //maybe re-throw the exception
   }
}