如果Json变量在WCF中包含空格或任何特殊字符，如何获取Json值

[OperationContract]
[WebGet(ResponseFormat = WebMessageFormat.Json)]
string GetJsonValue(string json);

public string GetJsonValue(string json)
{
    // 使用DataContractJsonSerializer类来反序列化Json字符串
    using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
    {
        var serializer = new DataContractJsonSerializer(typeof(JsonObject));
        var jsonObject = (JsonObject)serializer.ReadObject(ms);

        // 获取Json值
        string value = jsonObject["key"].ToString();

        return value;
    }
}

<system.serviceModel>
  <services>
    <service name="YourService">
      <endpoint address="" binding="webHttpBinding" contract="YourContract" behaviorConfiguration="webBehavior" />
    </service>
  </services>
  <behaviors>
    <endpointBehaviors>
      <behavior name="webBehavior">
        <webHttp />
      </behavior>
    </endpointBehaviors>
  </behaviors>
</system.serviceModel>