How to add assignments to Projects in SharePoint 2013 using CSOM

1. PublishedProject publishedProject = null;
2. DraftProject draftProject = null;
3. DraftAssignment draftAssignment = null;
4. AssignmentCreationInformation assignmentInfo = null;
5. QueueJob queueJobAssignment = null;
7. try
8. {
9.     publishedProject = availableProjects[new Guid(projectId)]; //find publishedProject from all available Projects
10.     draftProject = publishedProject.CheckOut();
12.     // Load/read all assignments
13.     projectContext.Load(draftProject.Assignments);
14.     projectContext.ExecuteQuery();
15.     
16.         assignmentInfo = new Microsoft.ProjectServer.Client.AssignmentCreationInformation();
17.         try
18.         {
19.             assignmentInfo.Id = new Guid();
20.             assignmentInfo.TaskId = new Guid();
21.             assignmentInfo.ResourceId = new Guid();
22.             assignmentInfo.Start = DateTime.ParseExact("2015-01-01 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
23.             assignmentInfo.Finish = DateTime.ParseExact("2016-01-01 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
24.             assignmentInfo.Notes = string.Empty;
26.             // Add the assignment to the checked out project.
27.             draftAssignment = draftProject.Assignments.Add(assignmentInfo);
29.             //Update the assignment with the baseline information
30.             draftAssignment.ActualWorkTimeSpan = TimeSpan.FromMilliseconds(Convert.ToDouble("100"));
31.             draftAssignment.WorkTimeSpan = TimeSpan.FromMilliseconds(Convert.ToDouble("10"));
32.             draftAssignment["BaselineWorkTimeSpan"] = TimeSpan.FromMilliseconds(Convert.ToDouble("50"));
33.             draftAssignment.ActualCost = Convert.ToDouble("500");
34.             draftAssignment.Cost = Convert.ToDouble("100");
35.             draftAssignment["BaselineCost"] = Convert.ToDouble(drAssignments[ind]["BaselineCost"]);
36.             draftAssignment.ActualStart = DateTime.ParseExact("2016-01-01 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
37.             draftAssignment["BaselineStart"] = DateTime.ParseExact("2016-01-01 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
38.             draftAssignment.ActualFinish = DateTime.ParseExact("2016-02-02 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
39.             draftAssignment["BaselineFinish"] = DateTime.ParseExact("2016-02-02 08:00 AM", "yyyy-MM-dd HH:mm tt", null);
40.         }
41.         catch (Exception ex)
42.         {
43.             // log exception assignment not added
44.         }
45.     
47.     queueJobAssignment = draftProject.Update();
48.     queueJobAssignment = draftProject.Publish(true);
49. }
50. catch (Exception ex)
51. {
52.     // log exception assignment not added
53. }