How to go about abstracting away different JSON library implementations

For my .NET/C# project, I need to use a JSON library but I should be dependent on a specific implementation. I know that there are plenty of JSON *c#* libraries out there like Json.NET, FastJson, Simple Json (simplejson.codeplex.com), e开发者_StackOverflowtc. Now how should I abstract away different implementations so that I will be able to switch libraries in a future time. I have no control on other libraries but I have full control on my project. Looking for your opinions.

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Depending on your needs you can create a single entry point to whatever library you wish to use.

public static class Json
{
    public static string Serialize(object o)
    {
        // ...  
    }

    public static T Deserialize<T>(string s)
    {
        // ...
    }
}

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One way to do this would be to create an interface that all libraries have the capability of matching, then implementing a wrapper class for each that implements the interface using that particular library. Each wrapper class will have to be in a separate assembly to avoid a dependency on the wrapper class's library.

Then, when you choose an implementation at runtime, you'll do it by instantiating the wrapper class through reflection.

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Best way is to create an interface.

Here is how we do it in Facebook C# SDK (http://facebooksdk.codeplex.com)

public interface IJsonSerializer
{
    string SerializeObject(object obj);
    object DeserializeObject(string json, Type type);
    T DeserializeObject<T>(string json);
    object DeserializeObject(string json);
}