Json 解析值时遇到意外字符

目前，我有一些问题.我在Json.NET中使用C#.问题是我总是得到:

{"分析值时遇到意外字符:e.路径""，第0行，位置0."

So the way I'm using Json.NET is the following. I have a Class which should be saved. The class looks like this:

public class stats
{
    public string time { get; set; }
    public string value { get; set; }
}

public class ViewerStatsFormat
{
    public List<stats> viewerstats { get; set; }
    public String version { get; set; }

    public ViewerStatsFormat(bool chk)
    {
        this.viewerstats = new List<stats>();
    }
}

One object of this class will be filled and saved with:

 File.WriteAllText(tmpfile, JsonConvert.SerializeObject(current), Encoding.UTF8);

保存部分工作正常，文件存在并已填充.之后，将使用以下命令将该文件读回到类中:

try 
{ 
    ViewerStatsFormat current = JsonConvert.DeserializeObject<ViewerStatsFormat>(tmpfile);
    //otherstuff        
}
catch(Exception ex)
{
    //error loging stuff
}

Now on the current= line comes the exception:

{"分析值时遇到意外字符:e.路径""，第0行，位置0."

I don't know why this comes. The JSON file is the following -> Click me I am the JSON link

Does anyone have any ideas?