The current version of C# as of September 2021 is C# 10.0. This version was released as part of .NET 6 in November 2021. C# 10.0 introduced several new features and improvements to the language, such as file-scoped namespaces, global using directives, and interpolated string handlers. One of the key features in C# 10.0 is file-scoped namespaces, which allows developers to declare that all types in a file are part of a particular namespace without explicitly enclosing them in a namespace block. This can help reduce boilerplate code and make code easier to read and maintain. Global using directives is another important feature introduced in C# 10.0. This feature allows developers to specify using directives at the global level, making them available to all files in a project. This can help simplify code and reduce the need to repeat using directives in multiple files. Interpolated string handlers are also a useful addition to C# 10.0. This feature allows developers to customize how interpolated strings are formatted by providing custom logic for handling expressions inside string interpolation. Overall, C# 10.0 brings several enhancements that can improve developer productivity, code readability, and maintainability. If you're working on a project using C#, I recommend exploring these new features to see how they can benefit your development workflow. Let me know if you have any specific questions or if you'd like to dive deeper into any of these features!