The updates options are available in the clickonce technique. You can check out the updates at:
1. Right Click Project in Solution Explorer.
2. Click Properties
3. Publish Tab
4. Click Updates Button
5. Here You Have updates check box and the options available.
6. ALso you have Minimum required version check box. Here you can define the latest publish version in order to do the updates automatically before the user intervention.
If you do not give the same version number as minimum, then it will give the User an option to install the updates or to skip them if the user press the skip button by mistake then he need to open the publish url again to get the updates or you need to publish it again for the new version.
