diff --git a/Toolkit.Foundation/IHostBuilderExtension.cs b/Toolkit.Foundation/IHostBuilderExtension.cs
index f7dd27b..9bb8653 100644
--- a/Toolkit.Foundation/IHostBuilderExtension.cs
+++ b/Toolkit.Foundation/IHostBuilderExtension.cs
@@ -4,9 +4,7 @@ using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.FileProviders.Physical;
 using Microsoft.Extensions.Hosting;
-using System.Collections.ObjectModel;
 using System.Text.Json;
-using static System.Collections.Specialized.BitVector32;
 
 namespace Toolkit.Foundation;
 
@@ -22,13 +20,22 @@ public static class IHostBuilderExtension
             services.AddConfiguration<TConfiguration>(typeof(TConfiguration).Name, "Settings.json", null);
 
     public static IHostBuilder AddConfiguration<TConfiguration>(this IHostBuilder builder,
+        string section,
+        TConfiguration configuration)
+        where TConfiguration : class, new()
+    {
+        return builder.AddConfiguration(section, "Settings.json", configuration);
+    }
+
+    public static IHostBuilder AddConfiguration<TConfiguration>(this IHostBuilder builder,
+        string section,
         Action<TConfiguration> configurationDelegate)
         where TConfiguration : class, new()
     {
         TConfiguration configuration = new();
         configurationDelegate.Invoke(configuration);
 
-        return builder.AddConfiguration(typeof(TConfiguration).Name, "Settings.json", configuration);
+        return builder.AddConfiguration(section, "Settings.json", configuration);
     }
 
     public static IHostBuilder AddConfiguration<TConfiguration>(this IHostBuilder builder,
@@ -53,7 +60,8 @@ public static class IHostBuilderExtension
             builder.AddConfiguration(configuration.GetType().Name,
                 "Settings.json", (TConfiguration?)configuration);
 
-    public static IHostBuilder AddConfiguration<TConfiguration>(this IHostBuilder builder, string section,
+    public static IHostBuilder AddConfiguration<TConfiguration>(this IHostBuilder builder,
+        string section,
         string path = "Settings.json",
         TConfiguration? defaultConfiguration = null,
         Action<JsonSerializerOptions>? serializerDelegate = null)
diff --git a/Toolkit.Foundation/ObservableCollection.cs b/Toolkit.Foundation/ObservableCollection.cs
index cc38a7a..fad0037 100644
--- a/Toolkit.Foundation/ObservableCollection.cs
+++ b/Toolkit.Foundation/ObservableCollection.cs
@@ -193,7 +193,7 @@ public partial class ObservableCollection<TItem> :
             }
 
             object? key = this.GetPropertyValue(() => attribute.Key) is { } value ? value : attribute.Key;
-            Publisher.PublishUI(OnPrepareAggregation(key));
+            Publisher.PublishUI(OnAggerate(key));
         }
     }
 
@@ -494,7 +494,7 @@ public partial class ObservableCollection<TItem> :
         collection.Insert(index > Count ? Count : index, item);
     }
 
-    protected virtual IAggerate OnPrepareAggregation(object? key) =>
+    protected virtual IAggerate OnAggerate(object? key) =>
         new AggerateEventArgs<TItem>() with { Key = key };
 
     protected virtual void RemoveItem(int index) =>