Jiří Činčura

C# 9 Source Generators - let the machine do the programming

Stop writing boilerplate code. Learn how C# 9 source generators let the machine do the programming for you at compile time.

C# 9 Source Generators - let the machine do the programming
#1about 2 minutes

What are C# source generators and how they work

Source generators are a metaprogramming feature that adds new source code to your project during the compilation phase.

#2about 6 minutes

Exploring common use cases for source generators

Source generators are ideal for replacing reflection, creating high-performance parsers, generating strongly-typed APIs, and producing AOT-friendly code.

#3about 3 minutes

Understanding the limitations and capabilities of generators

Source generators can only add new code, not modify existing code, and they run in a non-deterministic order but can produce compiler diagnostics.

#4about 6 minutes

Demo: Building a simple hello world generator

A step-by-step walkthrough shows how to create a basic source generator that adds a static class and method to the compilation.

#5about 7 minutes

Demo: Generating a C# class from a CSV file

This demonstration shows how to read an external file during compilation and dynamically generate a C# class based on its contents.

#6about 10 minutes

Demo: Automating the INotifyPropertyChanged pattern

Learn how to use attributes and a syntax receiver to automatically generate the boilerplate code for the INotifyPropertyChanged interface.

#7about 6 minutes

Demo: Creating a high-performance custom serializer

This example demonstrates building a source generator that creates a fast, custom serialization method for a class marked with an attribute.

#8about 4 minutes

Managing dependencies and producing compiler diagnostics

Understand the two types of dependencies for source generators and learn how to report custom warnings or errors back to the developer.

#9about 2 minutes

Summary and key takeaways for source generators

Source generators are a powerful tool for library authors to reduce boilerplate, improve performance, and create better developer experiences.

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