Detecting a 3G connection in Windows 7 and 8 in a desktop application

[EDN Admin]

Hi
I am in the process of developing a cloud backup software. The application is a desktop application developed using C#.
I need to add an option to stop/pause the backup if the computer was connected to a 3G network to save cost for the user.
I cannot seem to be able to find any example on how this can be achieved, there are some examples for Windows Phone and Windows Store Apps but I cannot find anything that can check if the connection type is a WiFi/Ethernet or
3G the latter is my main concern.

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I tried a test application to enumerate the networks:
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<span class="typ" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#2b91af Console<span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 .<span class="typ" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#2b91af WriteLine<span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 (<span class="str" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#800000 "Name: "<span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent <span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 +<span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent networkInterface<span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 .<span class="typ" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#2b91af Name<span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 );<span class="pln" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent
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<span class="pun" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; background-color:transparent; color:#000000 }[/code][/code]
<p style="padding-right:0px; font-size:13.63636302947998px; vertical-align:baseline; clear:both; word-wrap:break-word; font-family:Arial,Liberation Sans,DejaVu Sans,sans-serif; line-height:17.27272605895996px
The above code list my 3G connection as PPP which can be either ADSL or 3G. I am not sure if I can differentiate using some other options or APIs.
I need a clear way to distinguish between those networks and so far I cannot find a way of doing so.
Can someone please help?
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