Very small! The DeviceEmulator nk.bin can be as small as 1.3mb! With that 1.3mb OS image, you can deploy and debug native applications using Visual Studio for Devices. Here's how... In Platform Builder Install the Device Emulator BSP from http://www.microsoft.com/downloads/details.aspx?FamilyID=474b03a6-e87d-455d-bc16-b8cf18ef39b4&displaylang=en
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