c# await async https://docs.microsoft.com/es-es/dotnet/csharp/programming-guide/concepts/async/ https://www.campusmvp.es/recursos/post/async-y-await-en-c-como-manejar-asincronismo-en-net-de-manera-facil.aspx https://www.c-sharpcorner.com/article/async-and-await-in-c-sharp/ https://blog.ndepend.com/c-async-await-explained/ https://github.com/juanpablofuentes/CSharp/tree/master/Sync