Multidimensional Indexed property binding in WPF

When I searched for indexed property binding in WPF, I did find some useful information like this one:

http://msdn.microsoft.com/en-us/library/ms752300.aspx#Path%5FSyntax

If I have a binding like so in XAML:

Text="{Binding [5], Mode=OneWay}"

Then, with this, if my datacontext has an integer indexer this[int indx] then I would get the element at index 5.
And if my datacontext has an indexer this[string sindx] (and no integer indexer), then I will get the element indexed by "5".
So far so good.
But, if I want to bind to a multidimensional indexed property, then it took a bit of "research" to figure out that I can do it by: Text="{Binding [5\,1], Mode=OneWay}"

Good to know... {Binding [2\,hello], Mode=OneWay} in the example below translates to:

            Binding b = new Binding("[2,hello]");

            b.Mode = BindingMode.OneWay;

            textBlock5.SetBinding(TextBox.TextProperty, b);

XAML to test indexer binding:

<TextBox Name="textBlock1" Text="{Binding [5], Mode=OneWay}" />
<TextBox Name="textBlock2" Text="{Binding [some\,string],Mode=OneWay}" />
<TextBox Name="textBlock3" Text="{Binding (Name), Mode=OneWay,RelativeSource={x:Static RelativeSource.Self }}" />
<TextBox Name="textBlock4" Text="{Binding SomeProp, Mode=OneWay}" />
<TextBox Name="textBlock5" Text="{Binding [2\,hello], Mode=OneWay}" />
<TextBox Name="textBlock6" Text="{Binding [Jagged][Jagged indexer property], Mode=OneWay}"/>


ViewModel:

    public class TestVM : INotifyPropertyChanged
    {
        public string this[int i]
        { get { return "Int single dimensional indexer: " + i.ToString(); } }
        public string this[string s1, string s2]
        { get{ return "String Multi Dimensional Indexer Called: " + s1 + " , " + s2; } }
        public string this[int i1, string s1]
        { get{ return "Integer String Multi Dimensional Indexer Called: " + i1.ToString() + " , " + s1; } }
        public string SomeProp
        { get{ return "SomeProp: Hello";} }
        public object this[string s]
        {
            get
            {
                if (s == "Jagged")
                    return this;//Just being lazy: test accessing something as [][] when the initial indexer is "Jagged"
                else
                    return "String single dimensional indexer: " + s;
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        public void Notify(string propertyname)
        {if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyname)); }
    }