This document discusses migrating from WCF to gRPC for .NET services. It provides an overview of the .NET roadmap and the transition from WCF to gRPC. gRPC uses protocol buffers for serialization and supports remote procedure calls across many languages. It offers performance benefits over WCF and can be implemented in ASP.NET Core using C# with clients using HttpClient. The document compares communication patterns between WCF and gRPC.