A C# . developer designs, implements, and manages software applications using Microsoft's C# language, version .. They utilize .NET framework to build Windows applications, web services, and other software. They write clean, scalable code using C# programming conventions, and test and deploy applications and systems. They revise, update, refactor, and debug code, improving application functionality. They use LINQ for data manipulation and lambda expressions for writing anonymous methods. They also employ extension methods and automatic properties for code simplification. A developer also evaluates user feedback, implements changes, and maintains technical documentation for reference and reporting.