Hi, Every ASP.NET application can contain a single file named global.asax in its root directory. This special file can be used to handle applicationwide events and declare applicationwide objects. Every ASP.NET application supports a certain number of events. Application_BeginRequest –raised by every request to the server. Application_End - Raised immediately before the end of all application instances. Application_Start – raised immediately after the first application is created. This event is guaranteed to occur only once. Init- Riased immediately after each application instance is created. This event might occur multiple times. You can handle any of these events in the Global.asax file by adding the appropriate subroutine. When the first user makes a request to your web site, the Application_Start event occurs. The Application_Start event is guaranteed to occur once throught the lifetiome of the application. It's a good practice to initialize global variables.