Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type <MyClass>

Question

This code:

var commandMessage = new CommandMessage { CorrelationId = Guid.NewGuid() };
var json = JsonConvert.SerializeObject(commandMessage);
var myCommandMessage = (CommandMessage)JsonConvert.DeserializeObject(json);

gives this error message:

Additional information: Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type 'QueueConnectionStringTester.CommandMessage'

This is the CommandMessage class:

public class CommandMessage
{
    public Guid CorrelationId { get; set; }        
}

What am I missing here?

Answer 1

You need to specify the type when deserializing.

Either:

var myCommandMessage = JsonConvert.DeserializeObject<CommandMessage>(json);

Or:

var myCommandMessage = (CommandMessage)JsonConvert.DeserializeObject(json, typeof(CommandMessage));