json、linq序列化器 Json.NET comes in different versions for the various .NET frameworks. -Net40: .NET latest (4.0 & 4.5) -Net35: .NET 3.5 SP1, Mono -Net20: .NET 2.0 -Silverlight: Silverlight 4 & 5 -WindowsPhone: Windows Phone 7 & 7.1 -Metro Windows 8, WinRT 4.5 -Portable Portable Class Library (.NET 4.0, WP7, SL4)