private void AddNewLine()
 {
     var newDataGridPropertyPlaceholder = new NewDataGridPropertyPlaceholder();
     newDataGridPropertyPlaceholder.PropertyChanged += OnPlaceholderPropertyChanged;
     newDataGridPropertyPlaceholder.MapManager = MapManager;
     AugmentedCollection.Add(newDataGridPropertyPlaceholder);
 }
        private void AddNewLine()
        {
            var newDataGridPropertyPlaceholder = new NewDataGridPropertyPlaceholder();

            newDataGridPropertyPlaceholder.PropertyChanged += OnPlaceholderPropertyChanged;
            newDataGridPropertyPlaceholder.MapManager       = MapManager;
            AugmentedCollection.Add(newDataGridPropertyPlaceholder);
        }