.NET 4.0 interview questions with answers: – What are code contracts?

Code contracts are used when you want to call and run a method under certain pre-conditions, post-conditions and running conditions (invariants).

For instance let’s say you want to call the below “Add” method under the following restrictions:-

  • Pre-condition:- “Add” method can only be called when “num1” and “num2” values are greater than zero.
  • Post-Condition: – The value returned from “Add” method cannot zero or less than zero.


So by using code contracts you can achieve the same by putting the below code.


So if you try to call the “Add” method with zero values you should get a contract exception error as shown in the below figure.


You can also watch our 500 .NET interview questions with answer videos from Questpond site.

Do not forget to watch these wonderful 12 c# and .NET interview question videos from youtube.com


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
This entry was posted in Uncategorized and tagged , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s