This document looks at the common limitations of monolithic applications and describes a gradual yet structured process for modernizing them.This document is intended for cloud architects, system administrators, and CTOs who are familiar with Windows and the .NET ecosystem and want to learn more about what modernization involves. Although this document focuses on custom-built server applications (such as ASP.NET or Windows Services applications), you can apply the lessons to other use cases.

https://cloud.google.com/architecture/modernization-path-dotnet-applications-google-cloud