.NET 6.0下关于Json解析的dll的相关问题

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问题遇到的现象和发生背景

System.Web.Extensions.dll和Newtonsoft.Json.dll在.NET 6.0下是不能用了吗？为什么找不到支持.NET6.0版本的dll，而且每次使用低版本就报下面这个错误：

img

Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.Security.Permissions, Version=0.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. 系统找不到指定的文件。

File name: 'System.Security.Permissions, Version=0.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'

at Newtonsoft.Json.Serialization.JsonTypeReflector.get_DynamicCodeGeneration()

at Newtonsoft.Json.Serialization.JsonTypeReflector.get_ReflectionDelegateFactory()

at Newtonsoft.Json.Serialization.DefaultContractResolver.GetDefaultCreator(Type createdType)

at Newtonsoft.Json.Serialization.DefaultContractResolver.InitializeContract(JsonContract contract)

at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract(Type objectType)

at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateContract(Type objectType)

at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)

at Newtonsoft.Json.Utilities.ThreadSafeStore`2.Get(TKey key)

at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type type)

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.GetContract(Object value)

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.GetContractSafe(Object value)

at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)

at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)

at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value, Type objectType)

at Newtonsoft.Json.JsonConvert.SerializeObjectInternal(Object value, Type type, JsonSerializer jsonSerializer)

at Newtonsoft.Json.JsonConvert.SerializeObject(Object value, Type type, JsonSerializerSettings settings)

at Newtonsoft.Json.JsonConvert.SerializeObject(Object value)

at Game.MainClass.Main(String[] args) in E:\My Project Directory\Visual Studio Project\Test\Test\Program.cs:line 15

问题相关代码，请勿粘贴截图

using System;

using Newtonsoft.Json;

namespace Game

{

class MainClass

{

public static void Main(string[] args)

{

Player player = new Player();

player.id = 1;

player.name = "player";

player.coin = 100;

string m1 = JsonConvert.SerializeObject(player);

Player m2 = JsonConvert.DeserializeObject<Player>(m1);

Console.WriteLine(m1);

Console.WriteLine(m2.ToString());

}

.net6 使用JsonSerializer

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