How to Automatically Use a DataTemplate Based on ContentControl's Current Content's DataType

Question

When I attempt to specify multiple DataTemplates for use by a ContentControl so that the correct one (based on Type) is used, I end up with Content that is simply the Conten

Answer 1

The x:Type bit should be between curly braces {}:

<DataTemplate DataType="{x:Type vm:TypeAViewModel}">

Answer 2

x:Type is a MarkupExtension, which requires {} to indicate to the XAML compiler.