diff --git a/src/BootstrapBlazor.Server/Components/Components/ThemeChooser.razor.cs b/src/BootstrapBlazor.Server/Components/Components/ThemeChooser.razor.cs
index b2c402f3fb4..f0ea4045a8b 100644
--- a/src/BootstrapBlazor.Server/Components/Components/ThemeChooser.razor.cs
+++ b/src/BootstrapBlazor.Server/Components/Components/ThemeChooser.razor.cs
@@ -42,7 +42,7 @@ private void OnClickTheme(SelectedItem item)
     {
         _currentTheme.Clear();
         WebsiteOption.CurrentValue.CurrentTheme = item.Value;
-        var theme = WebsiteOption.CurrentValue.Themes.Find(i => i.Key == item.Value);
+        var theme = WebsiteOption.CurrentValue.Themes.FirstOrDefault(i => i.Key == item.Value);
         if (theme is { Files: not null })
         {
             _currentTheme.AddRange(theme.Files);
diff --git a/src/BootstrapBlazor.Server/Data/WebsiteOptions.cs b/src/BootstrapBlazor.Server/Data/WebsiteOptions.cs
index c1c36ab6512..bf3fbb00f18 100644
--- a/src/BootstrapBlazor.Server/Data/WebsiteOptions.cs
+++ b/src/BootstrapBlazor.Server/Data/WebsiteOptions.cs
@@ -3,10 +3,12 @@
 // See the LICENSE file in the project root for more information.
 // Maintainer: Argo Zhang(argo@live.ca) Website: https://www.blazor.zone
 
+using System.Collections.Frozen;
+
 namespace BootstrapBlazor.Server.Data;
 
 /// <summary>
-/// 
+/// WebsiteOptions 网站配置类
 /// </summary>
 public class WebsiteOptions
 {
@@ -102,12 +104,12 @@ public class WebsiteOptions
     /// <summary>
     /// 获得/设置 资源配置集合
     /// </summary>
-    public Dictionary<string, string?> SourceCodes { get; private set; }
+    public FrozenDictionary<string, string?> SourceCodes { get; private set; }
 
     /// <summary>
     /// 获得/设置 资源配置集合
     /// </summary>
-    public Dictionary<string, string?> Videos { get; private set; }
+    public FrozenDictionary<string, string?> Videos { get; private set; }
 
     /// <summary>
     /// 获得/设置 当前主题
@@ -127,13 +129,13 @@ public class WebsiteOptions
     /// <summary>
     /// 获得/设置 当前网站友联集合
     /// </summary>
-    public Dictionary<string, string?> Links { get; set; }
+    public FrozenDictionary<string, string?> Links { get; set; }
 
     /// <summary>
     /// 获得/设置 网站主题配置集合
     /// </summary>
     [NotNull]
-    public List<ThemeOption>? Themes { get; set; }
+    public HashSet<ThemeOption>? Themes { get; set; }
 
     /// <summary>
     /// 构造函数
@@ -141,9 +143,9 @@ public class WebsiteOptions
     public WebsiteOptions()
     {
         var config = GetConfiguration("docs.json");
-        SourceCodes = config.GetSection("src").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToDictionary(item => item.Key, item => item.Value);
-        Videos = config.GetSection("video").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToDictionary(item => item.Key, item => item.Value);
-        Links = config.GetSection("link").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToDictionary(item => item.Key, item => item.Value);
+        SourceCodes = config.GetSection("src").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToFrozenDictionary(item => item.Key, item => item.Value);
+        Videos = config.GetSection("video").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToFrozenDictionary(item => item.Key, item => item.Value);
+        Links = config.GetSection("link").GetChildren().Select(c => new KeyValuePair<string, string?>(c.Key, c.Value)).ToFrozenDictionary(item => item.Key, item => item.Value);
 
 #if DEBUG
         IsDevelopment = true;
diff --git a/src/BootstrapBlazor.Server/Services/CodeSnippetService.cs b/src/BootstrapBlazor.Server/Services/CodeSnippetService.cs
index 23753976abb..d563d9577b6 100644
--- a/src/BootstrapBlazor.Server/Services/CodeSnippetService.cs
+++ b/src/BootstrapBlazor.Server/Services/CodeSnippetService.cs
@@ -4,6 +4,7 @@
 // Maintainer: Argo Zhang(argo@live.ca) Website: https://www.blazor.zone
 
 using Microsoft.Extensions.Options;
+using System.Collections.Frozen;
 
 namespace BootstrapBlazor.Server.Services;
 
@@ -15,7 +16,7 @@ class CodeSnippetService
 
     private string SourceCodePath { get; set; }
 
-    private Dictionary<string, string?> SourceCodes { get; set; }
+    private FrozenDictionary<string, string?> SourceCodes { get; set; }
 
     private bool IsDevelopment { get; }
 
@@ -62,7 +63,7 @@ public async Task<string> GetCodeAsync(string codeFile)
             // codeFile = ajax.razor.cs
             var segs = codeFile.Split('.');
             var key = segs[0];
-            var typeName = SourceCodes.TryGetValue(key, out var value) ? value : string.Empty;
+            var typeName = SourceCodes.TryGetValue(key.ToLowerInvariant(), out var value) ? value : string.Empty;
             if (!string.IsNullOrEmpty(typeName))
             {
                 var fileName = codeFile.Replace(key, typeName);