New Features .NET 9 and C# 13: What Developers Need to Know

New Features .NET 9 and C# 13: What Developers Need to Know .NET 9 introduces several significant enhancements across its runtime, libraries, and ASP.NET Core framework. The runtime now features a new attribute model for feature switches, enabling libraries to toggle functionalities effectively. Performance improvements, such as dynamic garbage collection and loop optimizations, enhance application efficiency. In the libraries, System.Text.Json supports nullable reference types and allows for customized JSON formatting.