.NET interview questions with answers: – What’s the difference between catch with parameter and catch without parameter?

First let’s try to understand this .NET interview question. In other words what is the difference between :-

catch(Exception e)





For this interview question many people answer, “Second one will cause compile error”. But both the codes will work properly. Actually from .NET 2.0 there is no difference. But in the initial versions of .NET i.e. prior 2.0 some of the exceptions thrown by some COM components did not translate to “Exception” compatible object.

From .NET 2.0 both code will execute properly and there is no difference between them internally. Both catches will handle all kind of exceptions.

After 2.0 a catch which does have any code written in it gives a warning as shown below. So many developers mark this as a difference.


But you can always overcome this issue by not putting a variable as shown in the below code.

catch (Exception)



This question is taken from the book .NET interview questions with answers  book written by Shivprasad koirala.

Connected to the above exception handling interview question one more interview question which is making round is What is the difference between throw and throw ex  ?. Below is a simple video for the same.


About c# and .NET Interview questions

This blog is for developers who want to crack .NET and C# interviews. It has all tips and tricks needed to crack .NET interviews , C# interview , SQL Server interview , Java interview , WCF Interview , Silverlight interview , WPF interview , LINQ interview , Entity framework Interview. Do not forget to watch our Learn step by step video series. Learn MVC in 16 hours:- https://www.youtube.com/watch?v=Lp7nSImO5vk Learn AngularJS Step by Step:- https://www.youtube.com/watch?v=0kmdjqgO9IY Learn Design Pattern in 8 hours:- https://www.youtube.com/watch?v=YDobmucohqk Learn C# and .NET in 60 days:- https://www.youtube.com/watch?v=yh2SrzCkNQA Learn MSBI in 32 hours:- https://www.youtube.com/watch?v=mGPJx3ocFgg Learn SharePoint Step by Step in 8 hours:- https://youtu.be/C2fW76SwJNU
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