Json property order in System.Text.Json

[kotx]

Users should be able to specify the order of a json property during serialization.
It is possible to specify order by changing the order of the properties in the code. However, it is not possible to do this in inherited classes.

Example

// FooView.cs
public class FooView : BaseView
{
    public string Foo { get; set; }
}

// BaseView.cs
public class BaseView
{
    public bool Success { get; set; }
}

FooView's properties will always be placed before BaseView's upon serialization.

{
    "Foo": "bar",
    "Success": true
}

Implementation

Newtonsoft.Json does it like this:

[JsonProperty(Order = -2)]
public string Foo { get; set; }

An idea for System.Text.Json could be to use the DataMemberAttribute instead of creating its own attribute.

[am11]

Duplicate of #728.

[kotx]

Closed in favor of #728.