using CSHARP to control CSR USB dongle (HCI) complete source code, has been tested.
File list:
CSRUSBControlApp
...............\USBControlApp
...............\.............\bin
...............\.............\...\Debug
...............\.............\obj
...............\.............\...\Debug
...............\.............\...\USBControlApp.csproj.FileList.txt
...............\.............\...\USBControlApp.csproj.FileListAbsolute.txt
...............\.............\Properties
...............\.............\..........\AssemblyInfo.cs
...............\.............\..........\Resources.Designer.cs
...............\.............\..........\Resources.resx
...............\.............\..........\Settings.Designer.cs
...............\.............\..........\Settings.settings
...............\.............\Form1.cs
...............\.............\Form1.Designer.cs
...............\.............\Form1.resx
...............\.............\Program.cs
...............\.............\USBControlApp.csproj
...............\.............\USBControlApp.csproj.user
...............\USBControlApp.sln
...............\USBControlApp.suo