Sample description of HAL extension idea

All.cs

  public enum LinkKind
    {
        Fetch,
        Save,
        Update
    }

    public enum Restrictions
    {
        Required,
        Optional
    }

    public class ActionableLink
    {
        public string Href { get; set; }

        [JsonConverter(typeof(StringEnumConverter))]
        public LinkKind Kind { get; set; }
        public string Name { get; set; }
    }

    public class PresentableField
    {
        public PresentableField()
        {
            Restrictions = new Restrictions[0];
        }

        [JsonProperty(ItemConverterType = typeof(StringEnumConverter))]
        public IEnumerable<Restrictions> Restrictions { get; set; }
        public string BoundTo { get; set; }
        public bool Editable { get; set; }
        public string Name { get; set; }
    }

    public class Presentable
    {
        public Presentable()
        {
            Fields = new PresentableField[0];
        }

        public IEnumerable<PresentableField> Fields { get; set; }
        public string ActionBoundTo { get; set; }
    }

    public class Metadata
    {
        public string ObjectName { get; set; }
        public string Description { get; set; }
    }

    public abstract class ExtendedModel
    {
        public ExtendedModel()
        {
            Links = new Dictionary<string,IEnumerable<ActionableLink>>();
        }

        [JsonPropertyAttribute("_links")]
        public Dictionary<string,IEnumerable<ActionableLink>> Links { get; set; }

        [JsonPropertyAttribute("_presentable")]
        public Presentable Presentable { get; set; }

        [JsonPropertyAttribute("_metadata")]
        public Metadata Metadata { get; set; }
    }