Report warnings reported by DocFx to a TFS pull request:

 var repoRoot = new DirectoryPath("c:\repo");
     var settings =
         new DocFxIssuesSettings("C:\build\docfx.log");

     ReportIssuesToPullRequest(
         DocFxIssues(settings),
         TfsPullRequests(
             new Uri("http://myserver:8080/tfs/defaultcollection/myproject/_git/myrepository"),
             "refs/heads/feature/myfeature",
             TfsAuthenticationNtlm()),
         repoRoot);