Summary
Every Software Project that is going to be deployed for more than a few weeks needs to be in a Source Control Repository. Source Control Software is included with most major Software Development Environments. VB.Net includes Git and Microsoft Team Foundation Server Source Control. Sourcegear Vault also offers Source Control Software that I have used over years. Sourcegear Vault offers a free single user license and is very reasonably priced for Software Development Teams.

1. Easily merge changes to a file that are made by more than one Sofware Developer.
2. Ensure that Software Developers are always working on the most up to date version of a file.
3. Ensure that Software Developers can easily rollback to earlier versions of their work.
4. Label a version of all the source code files of a Software Development Project. This Source Control Label can be used to retrieve one set of source code from the exact point in time that the Source Control Label was created.
5. Easily compare the differences between two files.