I developed a simple web application. A label and a button. On click of Button, the label will display Hello World.
When I deploy this web application on my web server
Eugene, You can get it working with high enough privilege like LocalSystem, but keep in mind that LocalSystem has administrator privileges on the local server and can also access network resources under the computer account, so if you application gets exploited, the attacker can get access to a lot of resources. Network Service on the other hand is just a user account on the local server and is also accessing network resources in the computer account context.