Feat 46 translate object detection function to dotnet

[Pastajello]

Hello,

This PR contains a demo object detection sample for #46

I've had some fun with it, had to oversome .NET SDK shortcomings and even learned something about JSON parsers in c#.

Insert file:

Please check and give me headsup if something is to be fixed :)

[Pastajello]

@Meldiron It's been soo long :D Ok, no problem, in some h

[Pastajello]

done