diff --git a/binding/csharp/.editorconfig b/binding/csharp/.editorconfig
index b53f6cb..9ff4bca 100644
--- a/binding/csharp/.editorconfig
+++ b/binding/csharp/.editorconfig
@@ -19,8 +19,7 @@ indent_size = 2
 end_of_line = lf
 
 [*.cs]
-dotnet_analyzer_diagnostic.category-Style.severity = none
 csharp_style_namespace_declarations = file_scoped:silent
 
 [*.cs]
-file_header_template = Copyright 2023 The Ip2Region Authors. All rights reserved.\nUse of this source code is governed by a Apache2.0-style\nlicense that can be found in the LICENSE file.\n@Author Alan <lzh.shap@gmail.com>\n@Date   2023/07/25\nUpdated by Argo Zhang <argo@live.ca> at 2025/11/21
+file_header_template = Copyright 2025 The Ip2Region Authors. All rights reserved.\nUse of this source code is governed by a Apache2.0-style\nlicense that can be found in the LICENSE file.\n@Author Alan <lzh.shap@gmail.com>\n@Date   2023/07/25\nUpdated by Argo Zhang <argo@live.ca> at 2025/11/21
diff --git a/binding/csharp/IP2Region.Net.BenchMark/Benmarks.cs b/binding/csharp/IP2Region.Net.BenchMark/Benmarks.cs
index 66dcb85..f5eb2fd 100644
--- a/binding/csharp/IP2Region.Net.BenchMark/Benmarks.cs
+++ b/binding/csharp/IP2Region.Net.BenchMark/Benmarks.cs
@@ -1,4 +1,4 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
diff --git a/binding/csharp/IP2Region.Net.BenchMark/Program.cs b/binding/csharp/IP2Region.Net.BenchMark/Program.cs
index 5ca00ae..49bae6f 100644
--- a/binding/csharp/IP2Region.Net.BenchMark/Program.cs
+++ b/binding/csharp/IP2Region.Net.BenchMark/Program.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 using BenchmarkDotNet.Running;
 using IP2Region.Net.BenchMark;
 
diff --git a/binding/csharp/IP2Region.Net.Test/SearcherTest.cs b/binding/csharp/IP2Region.Net.Test/SearcherTest.cs
index b9b4e22..ce10a11 100644
--- a/binding/csharp/IP2Region.Net.Test/SearcherTest.cs
+++ b/binding/csharp/IP2Region.Net.Test/SearcherTest.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 using IP2Region.Net.Abstractions;
 using IP2Region.Net.XDB;
 using Microsoft.Extensions.DependencyInjection;
diff --git a/binding/csharp/IP2Region.Net.Test/UtilTest.cs b/binding/csharp/IP2Region.Net.Test/UtilTest.cs
index 8d6eb3d..8a4d38b 100644
--- a/binding/csharp/IP2Region.Net.Test/UtilTest.cs
+++ b/binding/csharp/IP2Region.Net.Test/UtilTest.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 using Xunit;
 
 namespace IP2Region.Net.Test;
diff --git a/binding/csharp/IP2Region.Net.Test/XdbTest.cs b/binding/csharp/IP2Region.Net.Test/XdbTest.cs
index 2e4a75f..8b92da8 100644
--- a/binding/csharp/IP2Region.Net.Test/XdbTest.cs
+++ b/binding/csharp/IP2Region.Net.Test/XdbTest.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 using Xunit;
 
 namespace IP2Region.Net.Test;
diff --git a/binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs b/binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs
index d270e4e..89cd5e5 100644
--- a/binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs
+++ b/binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using System.Net;
 
diff --git a/binding/csharp/IP2Region.Net/Extensions/ServiceCollectionExtensions.cs b/binding/csharp/IP2Region.Net/Extensions/ServiceCollectionExtensions.cs
index ace55ad..16fbf05 100644
--- a/binding/csharp/IP2Region.Net/Extensions/ServiceCollectionExtensions.cs
+++ b/binding/csharp/IP2Region.Net/Extensions/ServiceCollectionExtensions.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Abstractions;
 using IP2Region.Net.XDB;
diff --git a/binding/csharp/IP2Region.Net/Internal/Abstractions/AbstractCacheStrategy.cs b/binding/csharp/IP2Region.Net/Internal/Abstractions/AbstractCacheStrategy.cs
index e277dde..a716382 100644
--- a/binding/csharp/IP2Region.Net/Internal/Abstractions/AbstractCacheStrategy.cs
+++ b/binding/csharp/IP2Region.Net/Internal/Abstractions/AbstractCacheStrategy.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using System.Buffers;
 
diff --git a/binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs b/binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs
index 0deb198..e71f5bd 100644
--- a/binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs
+++ b/binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Internal.Abstractions;
 using IP2Region.Net.XDB;
diff --git a/binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs b/binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs
index ad3e2ba..fad002b 100644
--- a/binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs
+++ b/binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Internal.Abstractions;
 
@@ -10,7 +11,7 @@ namespace IP2Region.Net.Internal;
 
 class ContentCacheStrategy : AbstractCacheStrategy
 {
-    ReadOnlyMemory<byte> _cacheData = default;
+    readonly ReadOnlyMemory<byte> _cacheData = default;
 
     public ContentCacheStrategy(string xdbPath) : base(xdbPath)
     {
diff --git a/binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs b/binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs
index 3a597b0..2a69364 100644
--- a/binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs
+++ b/binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Internal.Abstractions;
 
diff --git a/binding/csharp/IP2Region.Net/Internal/VectorIndexCacheStrategy.cs b/binding/csharp/IP2Region.Net/Internal/VectorIndexCacheStrategy.cs
index f34b1b2..89ff83e 100644
--- a/binding/csharp/IP2Region.Net/Internal/VectorIndexCacheStrategy.cs
+++ b/binding/csharp/IP2Region.Net/Internal/VectorIndexCacheStrategy.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
 // @Author Alan <lzh.shap@gmail.com>
 // @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Internal.Abstractions;
 
@@ -10,12 +11,12 @@ namespace IP2Region.Net.Internal;
 
 internal class VectorIndexCacheStrategy : AbstractCacheStrategy
 {
-    ReadOnlyMemory<byte> _vectorCahe = default;
+    readonly ReadOnlyMemory<byte> _vectorCache = default;
 
     public VectorIndexCacheStrategy(string xdbPath) : base(xdbPath)
     {
-        _vectorCahe = base.GetData(256, 256 * 256 * 8);
+        _vectorCache = base.GetData(256, 256 * 256 * 8);
     }
 
-    public override ReadOnlyMemory<byte> GetVectorIndexStartPos(int offset) => _vectorCahe.Slice(offset, 8);
+    public override ReadOnlyMemory<byte> GetVectorIndexStartPos(int offset) => _vectorCache.Slice(offset, 8);
 }
diff --git a/binding/csharp/IP2Region.Net/XDB/CachePolicy.cs b/binding/csharp/IP2Region.Net/XDB/CachePolicy.cs
index 9397ee0..59b6b29 100644
--- a/binding/csharp/IP2Region.Net/XDB/CachePolicy.cs
+++ b/binding/csharp/IP2Region.Net/XDB/CachePolicy.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 namespace IP2Region.Net.XDB;
 
 /// <summary>
diff --git a/binding/csharp/IP2Region.Net/XDB/Searcher.cs b/binding/csharp/IP2Region.Net/XDB/Searcher.cs
index 1aa7fc6..adb30d6 100644
--- a/binding/csharp/IP2Region.Net/XDB/Searcher.cs
+++ b/binding/csharp/IP2Region.Net/XDB/Searcher.cs
@@ -1,8 +1,9 @@
-// Copyright 2023 The Ip2Region Authors. All rights reserved.
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
 // Use of this source code is governed by a Apache2.0-style
 // license that can be found in the LICENSE file.
-// @Author Alan Lee <lzh.shap@gmail.com>
-// @Date   2023/07/23
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
 using IP2Region.Net.Abstractions;
 using IP2Region.Net.Internal;
@@ -57,7 +58,7 @@ public class Searcher : ISearcher
     public string? Search(uint ipAddress)
     {
         var bytes = BitConverter.GetBytes(ipAddress);
-        bytes.Reverse();
+        Array.Reverse(bytes);
         return SearchCore(bytes);
     }
 
diff --git a/binding/csharp/IP2Region.Net/XDB/Util.cs b/binding/csharp/IP2Region.Net/XDB/Util.cs
index 0510f40..54afc7a 100644
--- a/binding/csharp/IP2Region.Net/XDB/Util.cs
+++ b/binding/csharp/IP2Region.Net/XDB/Util.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 using System.Buffers;
 using System.Buffers.Binary;
 using System.Net;
@@ -35,7 +42,7 @@ public static class Util
 
         if (!File.Exists(dbPath))
         {
-            throw new FileNotFoundException("xdb file not fould.", dbPath);
+            throw new FileNotFoundException("xdb file not found.", dbPath);
         }
 
         using var reader = File.OpenRead(dbPath);
diff --git a/binding/csharp/IP2Region.Net/XDB/XdbVersion.cs b/binding/csharp/IP2Region.Net/XDB/XdbVersion.cs
index e93e9db..5630cf8 100644
--- a/binding/csharp/IP2Region.Net/XDB/XdbVersion.cs
+++ b/binding/csharp/IP2Region.Net/XDB/XdbVersion.cs
@@ -1,3 +1,10 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
 namespace IP2Region.Net.XDB;
 
 /// <summary>