AzureDevOps - Creating WorkItem via JsonPatchOperation

To create a workitem I need to specify its fields but where exactly can I see all the possible "field paths" on my AzureDevOps site? I've edited an existing workitem and added some more fields to it but I cant seem to find the needed "field path" for my JsonPatchOperation.

Any ideas? Thanks in advance!

public static WorkItem CreateWorkItem(VssConnection connection, string title, string type, string description, string tags)
    {

        string project = "xxx";
  
        // Construct the object containing field values required for the new work item
        JsonPatchDocument patchDocument = new JsonPatchDocument();

        patchDocument.Add(
            new JsonPatchOperation()
            {
                Operation = Operation.Add,
                Path = "/fields/System.Title", <-- field path
                Value = title
            }
        );

        patchDocument.Add(
            new JsonPatchOperation()
            {
                Operation = Operation.Add,
                Path = "/fields/System.Description", <-- field path
                Value = description
            }
        );

 

        // Get a client        
        WorkItemTrackingHttpClient workItemTrackingClient = connection.GetClient<WorkItemTrackingHttpClient>();

        // Create the new work item
        WorkItem newWorkItem = workItemTrackingClient.CreateWorkItemAsync(patchDocument, project, type).Result;

        Console.WriteLine("Created work item ID {0} {1}", newWorkItem.Id, newWorkItem.Fields["System.Title"]);

        return newWorkItem;
    }

You can use the process template editor to see all fields in your org.

• Install Process Editor to VS:

• Open Fields Browser:

• Check needed fields: