implement appcenter and minor fix

src/AppCenterSDK/Models/Serialization/LogSerializer.cs

@@ -0,0 +1,40 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using Newtonsoft.Json;
+
+namespace YaeAchievement.AppCenterSDK.Models.Serialization;
+
+#pragma warning disable CS8604, CS8765, CS8603
+public static class LogSerializer {
+    
+    private static readonly JsonSerializerSettings SerializationSettings;
+    private static readonly LogJsonConverter Converter = new ();
+
+    static LogSerializer() {
+        SerializationSettings = new JsonSerializerSettings {
+            Formatting = Formatting.None,
+            NullValueHandling = NullValueHandling.Ignore,
+            DateFormatHandling = DateFormatHandling.IsoDateFormat,
+            DateTimeZoneHandling = DateTimeZoneHandling.Utc,
+            ReferenceLoopHandling = ReferenceLoopHandling.Serialize,
+            Converters = { Converter }
+        };
+    }
+
+    public static void AddLogType(string typeName, Type type) {
+        Converter.AddLogType(typeName, type);
+    }
+    
+    public static string Serialize(LogContainer logContainer) {
+        return JsonConvert.SerializeObject(logContainer, SerializationSettings);
+    }
+
+    public static string Serialize(Log log) {
+        return JsonConvert.SerializeObject(log, SerializationSettings);
+    }
+    
+    public static LogContainer? DeserializeLogs(string json) {
+        return JsonConvert.DeserializeObject<LogContainer>(json, SerializationSettings);
+    }
+}