Raspberry Pi GUI Application using Windows IoT VB.net or C#

I am working on a proof of concept application that would use a Raspberry Pi 2 or 3 with 7" touchscreen to send status updates to my existing API. The application would have a GUI interface that displays the location name and current status and 3 buttons. Each button sends an http request to the API to update the status. A background process would monitor the GPIO for switch input, which would also update the status and send an http request to the API. There would also need to be a settings page that is password protected that stores the Account and Location ID and possibly several other fields in the future. This data would be stored in a settings file and loaded and validated through the API at startup. The application should be written using Visual Studio VB.net, but C# would be acceptable. I will need all raw code and files. You will need to have a RPi 2 or 3 with GPIO connector and Windows IoT for testing. I will deploy the application on my device upon completion.