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net9.0

ASP.NET Core MVC features that use Newtonsoft.Json. Includes input and output formatters for JSON and JSON PATCH. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/b4d87e3b9131a019bc3b51df99ff69ac79bef459

Published
Oct 13, 2026
6d ago
Total Downloads
844.0M
844,015,939

Install

dotnet add package Microsoft.AspNetCore.Mvc.NewtonsoftJson --version 9.0.21
ProductVersions
.NET
net9.0

README

About

Microsoft.AspNetCore.Mvc.NewtonsoftJson is a NuGet package designed to enable the use of JSON serialization and deserialization using Newtonsoft.Json in ASP.NET Core MVC applications. This package provides support for handling JSON input and output in ASP.NET Core MVC controllers, allowing for seamless integration with existing Newtonsoft.Json configurations and features.

Key Features

  • Integration of Newtonsoft.Json into ASP.NET Core MVC for JSON serialization and deserialization.
  • Compatible with ASP.NET Core 3.0 and newer.
  • Allows customization of JSON serialization settings.
  • Supports handling JSON requests and responses in MVC controllers.

How to Use

To start using Microsoft.AspNetCore.Mvc.NewtonsoftJson in your ASP.NET Core MVC application, follow these steps:

Installation

dotnet add package Microsoft.AspNetCore.Mvc.NewtonsoftJson

Configuration

In your Startup.cs file, configure NewtonsoftJson as the default JSON serializer for ASP.NET Core MVC:

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using Newtonsoft.Json;

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllersWithViews()
        .AddNewtonsoftJson(options =>
        {
            // Configure Newtonsoft.Json options here
            options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
            options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
        });
}

Usage

Now, you can use Newtonsoft.Json serialization and deserialization in your ASP.NET Core MVC controllers:

using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;

public class SampleController : Controller
{
    [HttpPost]
    public IActionResult Post([FromBody] MyModel model)
    {
        // Your action logic here
    }
}

public class MyModel
{
    public string Name { get; set; }
    public int Age { get; set; }
}

For more information on configuring and using Newtonsoft.Json in ASP.NET Core MVC, refer to the official documentation.

Main Types

The main types provided by this library are:

  • NewtonsoftJsonOptions: Options for configuring Newtonsoft.Json serialization settings.
  • NewtonsoftJsonInputFormatter: Input formatter for handling JSON input using Newtonsoft.Json.
  • NewtonsoftJsonOutputFormatter: Output formatter for handling JSON output using Newtonsoft.Json.

Additional Documentation

Feedback & Contributing

Microsoft.AspNetCore.Authentication.JwtBearer is released as open-source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Changes from Previous Version

No structural changes between v9.0.20 and v9.0.21.

Adoption Assessment

A verified publisher signal is available. Assess fit from the package's supported frameworks, license and dependency graph rather than popularity alone.

Compatibility metadata lists 1 target framework; confirm the exact target used by your application.

Related Guides & Workflows

Learn how to evaluate, integrate, or audit this package in your .NET project.