使用DataContractJsonSerializer进行序列化时，将JSON对象保留为字符串

Question

当前，我正在尝试解析的API收到动态JSON响应。收到的JSON示例如下：

 {
  "data": [
    {
      "Id": "XXXXXXXXXXXXXXXXXXXXXXXX",
      "IsActive": true,
      "DateCreated": "2017-11-09T00:01:49.827Z",
      "DateModified": "2017-11-09T00:01:49.827Z",
      "IsDeleted": false,
      "Uid": "XXXXXXXXXXXXXXXXXXXXXXXX",
      "CustomObject": {
        "customdata1": " Store my customdata1 value",
        "customdata2": " Store my customdata2 value"
      }
    }
  ],
  "Count": 1
}

在上述JSON中，在序列化时，我希望CustomObject映射到C＃对象中的字符串。下面是我想要的对象结构的示例。

[System.Runtime.Serialization.DataContract]
public class CustomObjectData
{
    [System.Runtime.Serialization.DataMember]
    public string Id { get; set; }
    [System.Runtime.Serialization.DataMember]
    public bool IsActive { get; set; }
    [System.Runtime.Serialization.DataMember]
    public string DateCreated { get; set; }
    [System.Runtime.Serialization.DataMember]
    public string DateModified { get; set; }
    [System.Runtime.Serialization.DataMember]
    public bool IsDeleted { get; set; }
    [System.Runtime.Serialization.DataMember]
    public string Uid { get; set; }
    [System.Runtime.Serialization.DataMember]
    public string CustomObject { get; set; }
}

[System.Runtime.Serialization.DataContract]
public class CustomObjectDataHolder
{
    [System.Runtime.Serialization.DataMember]
    public List<CustomObjectData> data { get; set; }
    [System.Runtime.Serialization.DataMember]
    public int Count { get; set; }
}

我正尝试将其开发为CRM的插件，因此无法使用NewtonSoft等其他第三方JSON序列化器。