What JSON library works well for you in .NET? [closed]

Answer 1

I wrote my own JSON serializer using DataContractJsonSerializer in the System.ServiceModel.Web.dll assembly [which is a component of WCF included in .NET 3.5 as a standard assembly, and in the .NET 3.5 SP1 Client Profile] (in .NET 4.0 and Silverlight 4, it's been moved to System.Runtime.Serialization.dll).

using System.IO;
using System.Runtime.Serialization.Json;

public class JsonObjectSerializer 
{
    public string Serialize<T>(T instance) where T : class
    {
        var serializer = new DataContractJsonSerializer(typeof(T));
        using (var memoryStream = new MemoryStream())
        {
            serializer.WriteObject(memoryStream, instance);

            memoryStream.Flush();
            memoryStream.Position = 0;

            using (var reader = new StreamReader(memoryStream))
            {
                return reader.ReadToEnd();
            }
        }
    }

    public T Deserialize<T>(string serialized) where T : class
    {
        var serializer = new DataContractJsonSerializer(typeof(T));
        using (var memoryStream = new MemoryStream())
        {
            using (var writer = new StreamWriter(memoryStream))
            {
                writer.Write(serialized);
                writer.Flush();

                memoryStream.Position = 0;

                return serializer.ReadObject(memoryStream) as T;
            }
        }
    }
}