c# - Deserialize JSON string into class with reflection -

i'm trying deserialize json string custom class. have use reflection. have dictionary serialize, send on httpput method, deserialize json string, , read dictionary fields. here's have far:

i'm putting values dictionary this:

dictionary<string, object> valuestoupdate = new dictionary<string, object>(); person p = new person(); p.personname = "origname"; p.age = "25"; p.isalive = true; valuestoupdate.add("person", p); valuestoupdate.add("length", 64.0); 

i'm using json serialize this:

string jsonstring = jsonconvert.serializeobject(valuestoupdate); 

i take jsonstring , send on rest api put method. put method updates various variables on custom object based on key values in dictionary using reflection (in example i'm updating customobject.person , customobject.length).

the put call deserializes jsonstring this:

dictionary<string, object> newfields = jsonconvert.deserializeobject<dictionary<string, object>>(jsonstring); 

i iterate through newfields , want use reflection update customobject's "person" class. httpput method reads jsonstring:

[httpput("/test/stuff")] public string putcontact([frombody]dynamic jsonstring) {     dictionary<string, object> newfields = jsonconvert.deserializeobject<dictionary<string, object>>(jsonstring);     foreach (var field in newfields)     {         console.writeline("\nfield key: " + field.key);         console.writeline("field value: " + field.value + "\n");          propertyinfo propinfo = typeof(contact).getproperty(field.key);         type propertytype = propinfo.propertytype;         var value = propinfo.getvalue(contacttoupdate, null);          if (propertytype.isclass)         {             propinfo.setvalue(contacttoupdate, field.value, null);         }     } } 

this generates error:

object of type newtonsoft.json.linq.jobject' cannot converted type 'person';

i've tried using json's populateobject method returned error:

newtonsoft.json.jsonserializationexception: cannot populate json object onto type 'person'. path 'personname', line 1....

so basically, how can go taking json string, converting class (in case 'person' class), , setting customobject's person field reflection?

if (propertytype.isclass) {     propinfo.setvalue(contacttoupdate, ((jobject)field.value).toobject(propertytype), null); }