An OutOfMemmoryException is thrown under the following conditions:
1. The map displays its data using the VisualizationLayer populated with MapShapeData object.
2. The zoom level is changed to Neighborhood using the Zoom button from the map's navigation.
3. The zoom button is hovered

Note: The MapShapeData should be visible when the zoom is applied

The exception is not reproducible if the project's Platform is set to x64.

Since Q1 2016, the BitMapCaching of RadMap is turned off by default and the issue is not reproducible unless you turn the caching on.

Possible Workarounds:

 - the exception is not reproducible if the project's Platform is set to x64

-  double check that UseBitMapCahe property of the Visualizationlayer is set to False. When False, the issue is not reproducible.