Ok, we've added Visual Studio 2008 solutions for the C# and VB.NET example Web API. Download the web api v1.7. Open the "LimeLM API.vs2008.sln" solution file.
Also, there's no .NET (VB or C#) example for limiting updates -- only PHP -- due to the configuration specific way it needs to be implemented. But it's rather simple to write.
You can see all the functions you need to use if you go in the "PHP\limit-updates\index.php" file. Then just apply those concepts to C# or VB.NET.
If you want we can throw an example together for you.