UIApplication uIApplication = commandData.Application;
Document doc = uIApplication.ActiveUIDocument.Document;
ModelPath modelPath = ModelPathUtils.ConvertUserVisiblePathToModelPath(doc.PathName);
List<WorksetId> worksetIds = WorksharingUtils.GetUserWorksetInfo(modelPath)
.Select(q => q.Id)
.ToList();
OpenOptions openOptions = new OpenOptions();
WorksetConfigurationOption worksetConfigurationOption = WorksetConfigurationOption.OpenAllWorksets;
WorksetConfiguration worksetConfiguration = new WorksetConfiguration(worksetConfigurationOption);
worksetConfiguration.Open(worksetIds);
openOptions.SetOpenWorksetsConfiguration(worksetConfiguration);
uIApplication.Application.OpenDocumentFile(modelPath, openOptions);