gRPC in ASP.NET Core: Foundations and Best Practices

Modern software architecture demands fast, efficient, and reliable communication between microservices. This written course provides a comprehensive introduction to gRPC in ASP.NET Core, helping you move past traditional REST APIs and adopt highly performant remote procedure calls. You will start with foundational concepts, understanding the core protocol architecture and how it compares to HTTP-based alternatives before writing any code. What you will learn: Understand the architectural differences between gRPC and REST APIs; Define structured data contracts using Protobuf syntax and type systems; Implement all four gRPC communication patterns including unary and streaming; Configure API versioning and routing strategies for evolving services; Apply modern security practices including transport layer security and token authentication; Set up structured logging, metrics, and health checks for production monitoring. We begin with essential terminology and the basics of protocol buffers, then progress to configuring channels, managing lifecycles, and implementing robust error handling. This text-only course is designed for web developers and backend engineers who are new to gRPC but have a basic familiarity with C# and ASP.NET Core. Start reading today to build faster, more resilient distributed systems.