Create AnalystComment to SR from C#

Question

I have a new Custom Console Task and i need to create Analyst Comment with Private flag.
This is the code for analyst comment but NOT work please help me
The code:
private bool AddAnalystLog(
            EnterpriseManagementGroup emg,
            EnterpriseManagementObject emoSelService,
            string displayname,
            string id,
            string comment,            
            Boolean flagprivado
            //Get the System.WorkItem.Library mp
            ManagementPack mpWorkItemLibrary = emg.ManagementPacks.GetManagementPack(new Guid("405D5590-B45F-1C97-024F-24338290453E"));
            //Get the actionlog class
            ManagementPackClass typeActionLog = emg.EntityTypes.GetClass("System.WorkItem.TroubleTicket.AnalystCommentLog", mpWorkItemLibrary);
            //Create a new action log entry
            CreatableEnterpriseManagementObject objectActionLog = new CreatableEnterpriseManagementObject(emg, typeActionLog);
            objectActionLog[typeActionLog, "Id"].Value = Guid.NewGuid().ToString();
            objectActionLog[typeActionLog, "Comment"].Value = comment + "\n";
            objectActionLog[typeActionLog, "EnteredBy"].Value = UserPrincipal.Current.DisplayName;
            objectActionLog[typeActionLog, "EnteredDate"].Value = DateTime.Now.ToUniversalTime();
            objectActionLog[typeActionLog, "DisplayName"].Value = displayname;
            objectActionLog[typeActionLog, "IsPrivate"].Value = "True";
            ManagementPackRelationship relActionLog = emg.EntityTypes.GetRelationshipClass("System.WorkItem.TroubleTicketHasAnalystComment", mpWorkItemLibrary);
            EnterpriseManagementObjectProjection emoSR = new EnterpriseManagementObjectProjection(emoSelService);               
            emoSR.Add(objectActionLog, relActionLog.Target);
            emoSR.Commit();
            return true;
Can you help me please?
The error is:
The object could not be added to the combination class beacause the parent is not proper class as specified by the role.
at
Microsoft.EnterpriseManagment.Common.ObjectProjectionHelper.AddChildObject(ObjectProjectionHelper ChildObject)
Thanks

Answer 1

I've been puzzling over this code for a while now, and i went all the way around the bend, looking at EMOP constructors, Other methods to create relationships, and projection construction vs populating from a projection type. I'll spare you the details,
because in the end, you are using the wrong relationship.
the relationship you specify, "System.WorkItem.TroubleTicketHasAnalystComment", is defined as between a System.WorkItem.TroubleTicket and an action log.
PS C:\Users\administrator.LAB> $TTACRel = Get-SCSMRelationshipClass System.WorkItem.TroubleTicketHasAnalystComment
PS C:\Users\administrator.LAB> $TTACRel.Source.Class
Abstract Name DisplayName ManagementPack
True System.WorkItem.TroubleTicket Trouble Ticket System.WorkItem.Library
PS C:\Users\administrator.LAB> $TTACRel.Target.Class
Abstract Name DisplayName ManagementPack
False System.WorkItem.TroubleTicket.AnalystCommentLog Trouble Ticket Analyst Comments System.WorkItem.Library
But Service Request isn't derived from TroubleTicket (this is news to me too), it derives directly from work item:
PS C:\Users\administrator.LAB> $SRClass = Get-SCSMClass ServiceRequest$
PS C:\Users\administrator.LAB> $SRClass.GetBaseTypes()
Abstract Name DisplayName ManagementPack
True System.WorkItem Work Item System.WorkItem.Library
True System.Entity Object System.Library
Incident does, however, which is why
Travis's demo code with this type does work:
PS C:\Users\administrator.LAB> $IRClass = Get-SCSMClass WorkItem.Incident$
PS C:\Users\administrator.LAB> $IRClass.GetBaseTypes()
Abstract Name DisplayName ManagementPack
True System.WorkItem.TroubleTicket Trouble Ticket System.WorkItem.Library
True System.WorkItem Work Item System.WorkItem.Library
True System.Entity Object System.Library
There's two things you can do about it. 
First, you want to target a relationship that actually does what you want to do. the relationship "System.WorkItemHasCommentLog" is between Work Items (including SRs) and action logs. This is probably what the Incident should be updated to use,
but maintenance is a low priority. 
Second, you might want to simplify and skip projections all together. If you're just trying to create and relate an analyst note, consider new CreatableEnterpriseManagementRelationshipObject(),
you could build your action log EMO as you do above, then build a relationship with CEMRO, set it's Source and Target properties,
then commit the relationship which will in turn commit the action log. This is how i have handle this need in powershell, where projections are more difficult to work with, and this is how
Travis set up his inital conditions for his demo code on projections. 
TL;DR - You've got a relationship DogHasFavoriteBall, between a dog and a ball and it works with schnauzers and with poodles, but it fails when you try to relate elephants. try MammalHasFavoriteBall.