Visual InterDev
You can switch between local and master modes for your project. Local mode is recommended because it allows you to work in "isolation" from the master server. Local mode ensures that your local copies of the files are not affected by updates made to the master Web application by other developers. This mode also keeps your changes from affecting others using the master Web application.
To specify local mode for your project
If you work alone and do not use the master server as your production server, you can work directly in master mode without impacting others using the application.
To switch to master mode