Newtonsoft.Json serialization returns empty json object

By default, NewtonSoft.Json will only serialize public members, so make your fields public:

public class Catagory{    public int catagoryId;    public string catagoryNameHindi;    public string catagoryNameEnglish;    public List<Object> subCatagories;    public Catagory(int Id, string NameHindi, string NameEng, List<Object> l)    {        this.catagoryId = Id;        this.catagoryNameHindi = NameHindi;        this.catagoryNameEnglish = NameEng;        this.subCatagories = l;    }}

Edit: If for some reason you really don't want to make your fields public, you can instead decorate them with the JsonPropertyAttribute to allow them to be serialized and deserialized:

[JsonProperty]int catagoryId;

You could also decorate your class to serialize all members you want without having to specify [JsonProperty] for each of them.

[JsonObject(MemberSerialization.OptOut)]public class Catagory {    ...}

The MemberSerialization enum allows you to specify what members you want to serialize:

• MemberSerialization.OptOut: All public members are serialized.
• MemberSerialization.OptIn: Only members marked with JsonPropertyAttribute or DataMemberAttribute are serialized.
• MemberSerialization.Fields: All public and private members are serialized.

Another cause of this problem--the class I was attempting to serialize derived from a base class that had the [DataContract] attribute, but the derived class lacked this attribute. Once I added [DataContract] to the derived class and [DataMember] to all of the public properties of the derived class it began working immediately.