¿Cómo iniciar la class VersionControlServer?

Quiero download el file de TFS 2013. Encontré la class VersionControlServer : msdn

Pero, ¿cómo inicializarlo?

  VersionControlServer vs; vs.DownloadFile(repositoryPath,localPath); // vs not initialized! 

¡Gracias!

 String repositoryPath = "$/MyColl1/Folder1/Folder2/TargetFile.txt"; String localPathStonetworking = Environment.CurrentDirectory + "/" + "TargetFile.txt"; String uriSite = "http://tfs-server:8080/tfs/../../vN.0/....asmx"; TfsTeamProjectCollection teamProjectCollection =TfsTeamProjectCollectionFactory.GetTeamProjectCollection(new Uri(uriSite)); VersionControlServer versionControlServer = teamProjectCollection.GetService<VersionControlServer>(); versionControlServer.DownloadFile(repositoryPath, localPathStonetworking);