怎么序列化和反序列化Json

需要添加引用：System.ServiceModel.Web 和 System.Runtime.Serialization，然后使用Using：

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

序列化为字符串:

   1: public static string SerializeToJsonString( object objectToSerialize )

   2: {

   3:     using( MemoryStream ms = new MemoryStream() )

   4:     {

   5:         DataContractJsonSerializer serializer =

   6:                 new DataContractJsonSerializer( objectToSerialize.GetType() );

   7:         serializer.WriteObject( ms, objectToSerialize );

   8:         ms.Position = 0;

   9: 

  10:         using( StreamReader reader = new StreamReader( ms ) )

  11:         {

  12:             return reader.ReadToEnd();

  13:         }

  14:     }

  15: }

反序列化:

   1: public static T Deserialize<T>( string jsonString )

   2: {

   3:     using( MemoryStream ms = new MemoryStream( Encoding.Unicode.GetBytes( jsonString ) ) )

   4:     {

   5:         DataContractJsonSerializer serializer = new DataContractJsonSerializer( typeof( T ) );

   6: 

   7:         return ( T )serializer.ReadObject( ms );

   8:     }

   9: }