Whether to check for null
- by coffeeaddict
I know that you should always check incoming params to a method for null. But what if I have this scenario with a try/catch referring to a local variable. Do I really need to check for null below? Because it's gonna catch it anyway if it's null and the next line of code tries to use the refundResponse variable:
public string DoRefund(...)
{
try
{
......
string refundTransactionID = string.Empty;
......
RefundTransactionResponseType refundResponse = transaction.DoRefund(...);
if (refundResponse != null)
refundTransactionID = refundResponse.RefundTransactionID;
.....
}
catch (Exception ex)
{
LogError(ex);
return ex.ToString();
}
}
