ClickOnce allows the vendors to provide regular updates for the applications. To enable automatic updates, select "publish" tab in Project Properties window and click on the "updates" button. In the Application Updates window, select the mode of application updates like ’after application starts’ and ’before application starts’. The former mode is used when there is a need to provide regular updates of the application after a period of time and in the later mode, the application checks for the updates only once, that is when the application runs for the first time. Click OK to close the Application Updates window and publish the application.