GetVersionHelper(currentBranch)
Then call GetNextVersion(defaultVersion) and this will return a VersionResult
VersionResult.RootVersion has an assembly safe version like 2.3.4
VersionResult.FullVersion has the full version like 2.3.4-somerelease
VersionResult.IsPreRelease lets you know if it is a prerelease (not build off default/master)
GetNextVersionInfo(currentBranch, defaultVersion) is a shortcut to the above if you do not need access to the VersionHelper class.