c# - How to serialize field of type class as main object fields with NewtonSoft json? -

assume have these classes:

public class baseentity  {     public int id; }  public class : baseentity {     public int afield;     public c c; }  public class b : baseentity {     public string bfield;     public c c; }  public class c : baseentity {     public string cfield; } 

now, want use json.net jsonconverter annotation serialize c below when want load a or b objects. example this:

[jsonconverter(typeof(jsonconvertercustomimpl))] public class c {     public string cfield; } 

and result of serialized a or b objects should this:

// object {    id: 0,    afield: 0,    cfield: '' }  // b object {    id: 0,    bfield: 0,    cfield: '' } 

i dont know how shoud=ld implement jsonconvertercustomimpl class.

update

i'm used this answer, defined flattenjsonconverter class , set jsonannotation of a , b, when run project, thi exception thrown:

an unhandled exception of type 'system.stackoverflowexception' occurred in newtonsoft.json.dll

update

see below diagram, c class attachment in application , many of models may contains that. attachment class have byte[] filecontent field contains uploaded file content. want serialize class flatten container class have access filecontent in ui side.

i found this way serialize c class flatten, throws exception when using jsonconverter in annotation.

note i'm serialize filecontent base64 string.

found way serialize object newtonsoft.json (http://blog.bitlinkit.com/custom-json/)

public actionresult hello() {     dynamic d = new jobject();     d.metricid = 11;     string json = newtonsoft.json.jsonconvert.serializeobject(d);     return content(json,"json"); } 

no need implement jsonconvertercustomimpl class