JsonNamingPolicy

Naming policies for System.Text.Json

This GitHub repo contains classes to change the name properties of a JSON into different naming conventions.

Update April 5 2022

Unlikely it will be added in .NET 7

Update Jul 23 2021

Microsoft has moved the implementation of kebab-case and snake_case to .NET 7

Additional information here

NuGet Package

Update Oct 13 2021 - NuGet Package NickJohn published 6 months ago, a NuGet Package with the code I share here.

You can incorporate the code easily inside of your developments.

You will find this NuGet Package here

Thanks a lot NickeJohn

JsonSnakeCaseNamingPolicy

This class creates a policy to change the name properties of a JSON into SnakeCase (snake_case) used in some programming languages and APIs.

This code passes the tests that you will find in the corefx SnakeCaseUnitTests of Microsoft

Use

var options = new JsonSerializerOptions() { PropertyNamingPolicy = new JsonSnakeCaseNamingPolicy() };
var person = new Person() { FirstName = "Jorge", Birthday = DateTime.UtcNow, MyJobCity = "Madrid" };
var json = JsonSerializer.Serialize(person, options);

Result

{"first_name":"Jorge","birthday":"2020-01-03T20:00:59.6991482Z","my_job_city":"Madrid"}

JsonKebabCaseNamingPolicy

This class creates a policy to change the name properties of a JSON into KebabCase (kebab-case).

Use

var options = new JsonSerializerOptions() { PropertyNamingPolicy = new JsonKebabCaseNamingPolicy() };
var person = new Person() { FirstName = "Jorge", Birthday = DateTime.UtcNow, MyJobCity = "Madrid" };
var json = JsonSerializer.Serialize(person, options);

Result

{"first-name":"Jorge","birthday":"2020-01-03T20:00:59.6991482Z","my-job-city":"Madrid"}