WPF KeyGestures - Binding non alphanumeric keys
Should be a simple one, but I can't work out how to do it. Using WPF4 I want to Bind Ctrl+- to Zoom Out and Ctrl+= to Zoom In:

        <KeyBinding Command="{Binding Content.ZoomInCommand}" Gesture="Ctrl+="/>
        <KeyBinding Command="{Binding Content.ZoomOutCommand}" Gesture="Ctrl+-"/>

However, I'm getting errors: in the case of Ctrl+=:

    Requested value '=' was not found.

Any ideas?
WPF KeyGestures - Binding non alphanumeric keys
===

Should be a simple one, but I can't work out how to do it. Using WPF4 I want to Bind Ctrl+- to Zoom Out and Ctrl+= to Zoom In:

        <KeyBinding Command="{Binding Content.ZoomInCommand}" Gesture="Ctrl+="/>
        <KeyBinding Command="{Binding Content.ZoomOutCommand}" Gesture="Ctrl+-"/>

However, I'm getting errors: in the case of Ctrl+=:

    Requested value '=' was not found.

Any ideas?