你可以试试这个代码

var origJObj = JObject.Parse(json).Dump();
    var cleanedJObj = new JObject();
    
    CleanJsonObject(origJObj, cleanedJObj);

    //if you need a json
    json = cleanedJObj.ToString();

public void CleanJsonObject(JObject origJObj, JObject cleanedJObj)
{
    foreach (var prop in origJObj.Properties())
    {
        var name = "";
        var startIndex = prop.Name.IndexOf(":");
        if (startIndex > 0)
        {
            name = prop.Name.Substring(startIndex + 1);
        }
        else name = prop.Name.Replace("@", "");
        if (prop.Value.Type == JTokenType.Object)
        {
            var newJObj = new JObject();
            CleanJsonObject((JObject)prop.Value, newJObj);
            cleanedJObj.Add(name, newJObj);
        }
        else
        {
            cleanedJObj.Add(name, prop.Value);
        }
    }
}

除了删除代码中不必要的部分之外，还可以尝试使用josn.net来自定义您的需求。
如何使用它的示例：

public class User
{
    public User(string json)
    {
        JObject jObject = JObject.Parse(json);
        JToken jUser = jObject["user"];
        name = (string) jUser["name"];
        teamname = (string) jUser["teamname"];
        email = (string) jUser["email"];
        players = jUser["players"].ToArray();
    }

    public string name { get; set; }
    public string teamname { get; set; }
    public string email { get; set; }
    public Array players { get; set; }
}

// Use
private void Run()
{
    string json = @"{""user"":{""name"":""asdf"",""teamname"":""b"",""email"":""c"",""players"":[""1"",""2""]}}";
    User user = new User(json);

    Console.WriteLine("Name : " + user.name);
    Console.WriteLine("Teamname : " + user.teamname);
    Console.WriteLine("Email : " + user.email);
    Console.WriteLine("Players:");

    foreach (var player in user.players)
        Console.WriteLine(player);
 }