MVC now serializes JSON with camel case names by default

[dougbu]

In previous milestones, MVC's JSON serialization used Json.NET's default naming convention. This maintained C# property names in the JSON.

In 1.0.0, MVC uses camel case names by default. This matches most JSON naming conventions.

Potential compatibility breaks

Applications which depend on the exact bytes sent over the wire or that include code such as

dynamic d = JObject.Parse(body);

may need to be adjusted.

To restore previous naming strategy

If you have case-sensitive clients that cannot be easily updated, change your Startup from

    services.AddMvc();

to

    services
        .AddMvc()
        .AddJsonOptions(options => options.SerializerSettings.ContractResolver = new DefaultContractResolver());

Example

Before

public class Person
{
    public int Id { get; set; }

    public string FullName { get; set; }
}

Would serialize to

{"Id":9000,"FullName":"John Smith"}

After

The same model will serialize to

{"id":9000,"fullName":"John Smith"}

Note the initial lowercase letters.

[dougbu]

Please see aspnet/Mvc#4842 for discussion of this change.

[dougbu]

See also the original issue we fixed in 1.0.0: aspnet/Mvc#4283

[dougbu]

Updated description to show the configuration one-liner.