Depending on the platform, the dotnet executable may use the most recent SDK available on the system, even when PATH is set up to find an older SDK deployment first; see this page for more information.
By enabling this option, the configured SDK home directory will be checked, and if it only includes a single SDK deployment, a global.json file will be created in the current directory, referencing that SDK version and disabling roll-forward.
Note: This will silently overwrite any global.json already present in the current directory.