Roslyn
Roslyn is the open-source .NET compiler platform developed by Microsoft, providing rich code analysis APIs for C# and Visual Basic .NET. It enables developers to build tools for code generation, refactoring, and static analysis by exposing the compiler's internal data structures and processes. Roslyn transforms the traditional black-box compiler into a set of accessible libraries that integrate with the .NET ecosystem.
Developers should learn Roslyn when building custom code analyzers, refactoring tools, or IDE extensions for C#/VB.NET projects, as it offers deep insights into syntax and semantics. It's essential for implementing coding standards, automated code fixes, or domain-specific languages within .NET applications, streamlining development workflows and improving code quality.