WPF Binding to items within a dictionary by key?

I can bind to a collection item using index:

<TextBlock FontStyle="Italic"  Text="{Binding Path=Exchanges[0].Name}" />

bu开发者_开发问答t what about using a dictionary key?

Path=Exchanges['AMEX'].Name

yep.. works like a charm

<TextBlock FontStyle="Italic"  Text="{Binding Path=ExchangesDictionary[AMEX].Name}" />