This tutorial is about the errors and handling it. Application error events and page error events are the two main events occurs often in web application. The author explains the features of these two errors and the mwthod of eradicating those events are clearly explained in this article. The main advantage of these two errors acording to the author is that the errors could run the code that can log the exception. Then the users could customize the error page to which the user is leaded. This article brings out a solution to the beginners to shortout the bugs while creating a web application and debugging it.