title: NTLM authentication HttpClient in Core
body: <p>I am trying to use the HttpClient to access a REST service which requires NTLM authentication. However I keep getting a 401 Unauthorized.
  My code looks like this</p>
  
  <pre><code>    private static void Main()
      {
          var uri = new Uri("http://localhost:15001");
          var credentialsCache = new CredentialCache { { uri, "NTLM", CredentialCache.DefaultNetworkCredentials } };
          var handler = new HttpClientHandler { Credentials = credentialsCache };
          var httpClient = new HttpClient(handler) { BaseAddress = uri, Timeout = new TimeSpan(0, 0, 10) };
          httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
          var response = httpClient.GetAsync("api/MyMethod").Result;
      }
  </code></pre>
  
  <p>My target framework is netcoreapp2.0. If I change to net461, it will work. Not sure what I am doing wrong?</p>