这是什么? Json.net (.net foundation) DLL?

Company Json.NET, developed and maintained by James Newton-King under the .NET Foundation, is a popular open-source library for working with JSON data in .NET applications. It provides a high-performance JSON framework that simplifies the process of serializing and deserializing JSON data, making it easier to work with JSON files or streams directly within C# and other .NET languages.

Json.NET supports various features such as custom serialization attributes, LINQ to JSON, XML comments, and more. The library is compatible with multiple versions of the .NET framework, including .NET Core and .NET Standard, ensuring broad applicability across different development environments. Its extensive documentation and active community contribute to its widespread adoption in both commercial and open-source projects.