In the last two chapters of the tutorial series, we discussed about the local database support in Windows Phone 7 (Mango). We learnt how to create a DataContext class from existing SQL CE database and also we learnt about the issues that arises once we add the class file in the project to build. We learnt the steps to resolve those issues too. In this article, we are going to discuss about the CRUD operations that we can do using the DataContext class with a small application. We will learn how to create and delete a database, we will also learn how to insert or fetch records. After reading this tutorial you will also be able to do other operations like edit, search etc.