Please refer to the Introduction to PnP Core Component and OfficeDevPnP.Core for more details. I have created a console application and added SharePointPnPCore2016 NuGet package for the SharePoint 2016 version.
Code Snippet
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Threading.Tasks;
  6. using Microsoft.SharePoint.Client;
  7. using OfficeDevPnP.Core;
  8. using OfficeDevPnP.Core.Extensions;
  9. using Microsoft.SharePoint.Client.Taxonomy;
  11. namespace SP2016PnPCoreComponentDemo
  12. {
  13. class Program
  14. {
  15. static void Main(string[] args)
  16. {
  17. // Input Parameters
  18. string siteUrl = "http://c7395723754/";
  19. string userName = "administrator";
  20. string password = "Mf165Nz2WV";
  21. string domain = "AD2012";
  22. Guid termSetID = new Guid("e6b07ab0-99d2-42b7-b2c7-ab6cdadf216d");
  23. string termName = "PnP New Term";
  25. OfficeDevPnP.Core.AuthenticationManager authMgr = new OfficeDevPnP.Core.AuthenticationManager();
  27. try
  28. {
  29. // Get the client context
  30. using (var ctx = authMgr.GetNetworkCredentialAuthenticatedContext(siteUrl, userName, password, domain))
  31. {
  32. // Add term to termset
  33. ctx.Site.AddTermToTermset(termSetID, termName);
  34. }
  35. }
  37. catch (Exception ex)
  38. {
  39. Console.WriteLine("Error Message: " + ex.Message);
  40. }
  41. }
  42. }
  43. }