Support Newtonsoft Attributes

[Kasper Fromm Pedersen]

It could be helpful if this library could support attributes from Newtonsoft such as

[JsonProperty(Required = Required.Always)]
[JsonConverter(typeof(TopicNameConverter))]

Furthermore it could be nice if converters could be added while adding the JSON file.

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseKestrel()
        .UseContentRoot(Directory.GetCurrentDirectory())
        .ConfigureAppConfiguration((hostingContext, config) =>
        {
            var env = hostingContext.HostingEnvironment;
            config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddJsonConverter(new JsonConverter());
            config.AddEnvironmentVariables();
        })
        .UseStartup<Startup>()
        .Build();

This would help people to map complex types with a parameterized constructor. Furthermore it is possible to make fields required such an error would be thrown while binding, should the settings file not contain the required field.

[Erwan JOLY]

comment in this pull request will answer to this question #789

[Kasper Fromm Pedersen]

I don't see them discuss the option of adding JsonConverters, or am I missing something?

[Erwan JOLY]

i mean about json property. For converter i guess it should be implemented the same way