What is this multiplatform container application they talk about? Is it a Hyper-V container with small Linux runtime? Or a docker-compose file with some containers running on Windows and some on Linux (e.g. ASP.NET on Windows and Redis on Linux)?
However, you can run either a Windows VM or a Linux VM on Hyper-V (or in Azure).
Also, you can now run .NET applications on Windows or Linux. But that is a bit orthogonal to your question. :)
Hopefully that helps.