private bool CheckProjectForDuplicateIncludes(ProjectDocument project)
        {
            if (project == null)
            {
                return(true);
            }

            var duplicates = project.Entities.GroupBy(e => e.Name)
                             .Where(g => g.Count() > 1);

            foreach (var dupe in duplicates)
            {
                var dialogModel = new DuplicateObjectsDialogViewModel(dupe.Key, dupe.AsEnumerable());
                var dialog      = new DuplicateObjectsDialog();
                dialog.DataContext = dialogModel;
                dialog.ShowDialog();

                if (dialog.DialogResult.HasValue && dialog.DialogResult.Value)
                {
                    var toRemove = dupe.Where(e => e.StoragePath.Relative != dialogModel.SelectedFile).ToList();
                    foreach (var entity in toRemove)
                    {
                        if (dialogModel.DeleteDuplicates)
                        {
                            project.RemoveEntity(entity);
                        }
                        else
                        {
                            project.UnloadEntity(entity);
                        }
                    }
                }
                else
                {
                    return(false);
                }
            }

            return(true);
        }