submodule对gitea不管用，所以直接拉了一份拉格兰

Lagrange.Core/Lagrange.OneBot/Core/Entity/OneBotFakeNode.cs

@@ -0,0 +1,71 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Lagrange.OneBot.Core.Entity.Message;
+
+namespace Lagrange.OneBot.Core.Entity;
+
+[Serializable]
+[JsonConverter(typeof(OneBotFakeNodeConverter<OneBotFakeNodeBase, OneBotFakeNode, OneBotFakeNodeSimple, OneBotFakeNodeText>))]
+public class OneBotFakeNodeBase
+{
+    [JsonPropertyName("name")] public string Name { get; set; } = string.Empty;
+
+    [JsonPropertyName("uin")] public string Uin { get; set; } = string.Empty;
+
+    // For onebot 11 compatibility
+    [JsonPropertyName("user_id")] public string UserId { set => Uin = value; }
+
+    // For onebot 11 compatibility
+    [JsonPropertyName("nickname")] public string Nickname { set => Name = value; }
+}
+
+[Serializable]
+public class OneBotFakeNode : OneBotFakeNodeBase
+{
+    [JsonPropertyName("content")] public List<OneBotSegment> Content { get; set; } = [];
+}
+
+[Serializable]
+public class OneBotFakeNodeSimple : OneBotFakeNodeBase
+{
+    [JsonPropertyName("content")] public OneBotSegment Content { get; set; } = new();
+}
+
+[Serializable]
+public class OneBotFakeNodeText : OneBotFakeNodeBase
+{
+    [JsonPropertyName("content")] public string Content { get; set; } = "";
+}
+
+public class OneBotFakeNodeConverter<T, TList, TSimple, TText> : JsonConverter<T>
+{
+    public override T? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        Utf8JsonReader readerClone = reader;
+        while (readerClone.Read())
+        {
+            if (readerClone.TokenType != JsonTokenType.PropertyName) continue;
+            if (readerClone.GetString() != "content") continue;
+            readerClone.Read();
+            switch (readerClone.TokenType)
+            {
+                case JsonTokenType.StartArray:
+                    return (T?)JsonSerializer.Deserialize(ref reader, typeof(TList), options);
+                case JsonTokenType.StartObject:
+                    return (T?)JsonSerializer.Deserialize(ref reader, typeof(TSimple), options);
+                case JsonTokenType.String:
+                    return (T?)JsonSerializer.Deserialize(ref reader, typeof(TText), options);
+                default:
+                    throw new Exception();
+            }
+        }
+
+        throw new Exception("json error");
+    }
+
+    public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
+    {
+        // Null
+
+    }
+}