Attributes on Lambdas in C#

Summary

C# 10 introduces the ability to add attributes directly to lambda expressions, providing developers with enhanced metadata and behavior modification capabilities. This feature is particularly powerful for scenarios involving source generators, middleware, custom analyzers, and interrupt handling. By allowing attributes on lambdas, which are compiled into methods, developers gain more flexibility and control over inline code behavior. The technique works with both standard and static lambda expressions, offering a new level of programmatic customization.