I'm pretty sure in that era Xamarin was closed source and a commerical offering. It wasn't until 2016 when MS acquired them that it became free and open source.

I'm pretty sure in that era Xamarin was closed source and a commerical offering. It wasn't until 2016 when MS acquired them that it became free and open source. So using .NET and C# wasn't really possible in 2014 without either paying a third party or buying the Xamarin company. I think folks forget how long ago we made Flutter.