diff --git a/AyCode.Core/Extensions/SerializeObjectExtensions.cs b/AyCode.Core/Extensions/SerializeObjectExtensions.cs
index d145687..d55b523 100644
--- a/AyCode.Core/Extensions/SerializeObjectExtensions.cs
+++ b/AyCode.Core/Extensions/SerializeObjectExtensions.cs
@@ -34,6 +34,7 @@ public static class SerializeObjectExtensions
     {
         if (json.StartsWith("\"") && json.EndsWith("\"")) json = Regex.Unescape(json).TrimStart('"').TrimEnd('"');
 
+        //JsonConvert.PopulateObject(json, existingObject);
         return JsonConvert.DeserializeObject<T>(json, options ?? Options);
     }
 
@@ -44,6 +45,12 @@ public static class SerializeObjectExtensions
         return JsonConvert.DeserializeObject(json, toType, options ?? Options);
     }
 
+    public static void JsonTo(this string json, object target, JsonSerializerSettings? options = null)
+    {
+        if (json.StartsWith("\"") && json.EndsWith("\"")) json = Regex.Unescape(json).TrimStart('"').TrimEnd('"');
+
+        JsonConvert.PopulateObject(json, target, options ?? Options);
+    }
     /// <summary>
     /// Using JSON
     /// </summary>
@@ -52,7 +59,17 @@ public static class SerializeObjectExtensions
     /// <param name="options"></param>
     /// <returns></returns>
     [return: NotNullIfNotNull(nameof(src))]
-    public static TDestination? CloneTo<TDestination>(this object? src, JsonSerializerSettings? options = null) where TDestination : class => src?.ToJson(options).JsonTo<TDestination>(options);
+    public static TDestination? CloneTo<TDestination>(this object? src, JsonSerializerSettings? options = null) where TDestination : class 
+        => src?.ToJson(options).JsonTo<TDestination>(options);
+
+    /// <summary>
+    /// Using JSON
+    /// </summary>
+    /// <param name="src"></param>
+    /// <param name="target"></param>
+    /// <param name="options"></param>
+    /// <returns></returns>
+    public static void CopyTo(this object? src, object target, JsonSerializerSettings? options = null) => src?.ToJson(options).JsonTo(target, options);
 
     //public static string ToJson(this Expression source) => JsonConvert.SerializeObject(source, Options);
 
diff --git a/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs b/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
index f170d8d..ec8bf59 100644
--- a/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
+++ b/AyCode.Services.Server/SignalRs/AcSignalRDataSource.cs
@@ -160,7 +160,7 @@ namespace AyCode.Services.Server.SignalRs
 
     [Serializable]
     [DebuggerDisplay("Count = {Count}")]
-    public abstract class AcSignalRDataSource<TDataItem, TId, TIList> : IList<TDataItem>, IList, IReadOnlyList<TDataItem> 
+    public abstract class AcSignalRDataSource<TDataItem, TId, TIList> : IList<TDataItem>, IList, IReadOnlyList<TDataItem>
         where TDataItem : class, IId<TId> where TId : struct 
         where TIList : class, IList<TDataItem>
     {
@@ -226,6 +226,8 @@ namespace AyCode.Services.Server.SignalRs
             }
         }
 
+        public TIList GetReferenceInnerList() => InnerList;
+
         private object[]? GetContextParams()
         {
             var parameters = new List<object>();