As of Json.NET 4.0 Release 1, there is native dynamic support.
You don't need to declare a class, just use dynamic :
dynamic jsonDe = JsonConvert.DeserializeObject(json);
All the fields will be available:
foreach (string typeStr in jsonDe.Type[0])
{
// Do something with typeStr
}
string t = jsonDe.t;
bool a = jsonDe.a;
object[] data = jsonDe.data;
string[][] type = jsonDe.Type;
With dynamic you don't need to create a specific class to hold your data.