Json 无法将 System.String 转换或转换为 Class 对象

我正在try 反序列化从Web API接收的JSON字符串

try
{
    string r = await App.client.GetUser();

    App.Authentication = JsonConvert.DeserializeObject<ApiResult>(r);

    await DisplayAlert("TEST", App.Authentication.ToString(), "OK");

    Application.Current.MainPage = new Schedule();
}
catch (Exception p)
{
    await DisplayAlert("Getting Authentication failed", p.ToString(), "TEST");
}

However it gives the error: Could not Cast or Convert System.String to App1.ApiResult App.Authentication = JsonConvert.DeserializeObject<ApiResult>(r);

应用程序.身份验证:

public static ApiResult Authentication = new ApiResult();`

JSON字符串:

"\\"状态\\":\\"0\"，\\"消息\\":{\\"ID\":5，\\"名字\\":\\"约翰\\"，\\"姓氏\\":\\"Doe\"，\\"邮箱\\":\"testemail@gmail.com\\"，\"密码\\":\"测试通行证\\"，\"创建日期\\":\"2016-10-26T15:01:08\"，\"RoleID\":1，\"门代码\\":9999}}"

ApiResult类:

public class ApiResult
{
    public string status { get; set; }
    public Account message { get; set; }
}

Account Class:

public class Account
{
    public string status { get; set; }
    public int ID { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Email { get; set; }
    public string Password { get; set; }
    public DateTime CreationDate { get; set; }
    public int RoleID { get; set; }
    public int doorCode { get; set; }
}

The full error message:

{"转换值时出错 \"{\"status\":\"0\"，\"message\":{\"ID\":5，\"FirstName\":\"John\"，\"LastName\":\"Doe\"，\"email\":\"testemail@gmail.com\"，\"password\":\"testPass\"，\"CreationDate\":\"2016-10-26T15:01:08\"，\"RoleID 若要键入"App1.ApiResult"，请执行以下操作.路径‘’，行1，位置232."}