diff --git a/Toolkit.Foundation/Aggerate.cs b/Toolkit.Foundation/Aggerate.cs
new file mode 100644
index 0000000..b88032f
--- /dev/null
+++ b/Toolkit.Foundation/Aggerate.cs
@@ -0,0 +1,10 @@
+namespace Toolkit.Foundation;
+
+public record Aggerate<TValue, TOptions>(TOptions? Options = null) : 
+    IAggerate
+    where TOptions : class
+{
+    public object? Key { get; init; }
+
+    public AggerateMode Mode { get; init; }
+}
\ No newline at end of file
diff --git a/Toolkit.Foundation/AggerateEventArgs.cs b/Toolkit.Foundation/AggerateEventArgs.cs
new file mode 100644
index 0000000..1693463
--- /dev/null
+++ b/Toolkit.Foundation/AggerateEventArgs.cs
@@ -0,0 +1,12 @@
+namespace Toolkit.Foundation;
+
+public record AggerateEventArgs<TValue> : 
+    IAggerate
+{
+    public object? Key { get; init; }
+
+    public static Aggerate<TValue, TOptions> With<TOptions>(TOptions options) where TOptions : class
+    {
+        return new Aggerate<TValue, TOptions>(options);
+    }
+}
\ No newline at end of file
diff --git a/Toolkit.Foundation/EnumerateMode.cs b/Toolkit.Foundation/AggerateMode.cs
similarity index 69%
rename from Toolkit.Foundation/EnumerateMode.cs
rename to Toolkit.Foundation/AggerateMode.cs
index 1827b0a..e7f4d54 100644
--- a/Toolkit.Foundation/EnumerateMode.cs
+++ b/Toolkit.Foundation/AggerateMode.cs
@@ -1,6 +1,6 @@
 namespace Toolkit.Foundation;
 
-public enum EnumerateMode
+public enum AggerateMode
 {
     Append,
     Reset
diff --git a/Toolkit.Foundation/Enumerate.cs b/Toolkit.Foundation/Enumerate.cs
deleted file mode 100644
index 9a90559..0000000
--- a/Toolkit.Foundation/Enumerate.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-namespace Toolkit.Foundation;
-
-public record Enumerate<TValue, TOptions>(TOptions? Options = null) : 
-    IEnumerate
-    where TOptions : class
-{
-    public object? Key { get; init; }
-
-    public EnumerateMode Mode { get; init; }
-}
\ No newline at end of file
diff --git a/Toolkit.Foundation/EnumerateEventArgs.cs b/Toolkit.Foundation/EnumerateEventArgs.cs
deleted file mode 100644
index a4c519c..0000000
--- a/Toolkit.Foundation/EnumerateEventArgs.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-namespace Toolkit.Foundation;
-
-public record EnumerateEventArgs<TValue> : 
-    IEnumerate
-{
-    public object? Key { get; init; }
-
-    public static Enumerate<TValue, TOptions> With<TOptions>(TOptions options) where TOptions : class
-    {
-        return new Enumerate<TValue, TOptions>(options);
-    }
-}
\ No newline at end of file
diff --git a/Toolkit.Foundation/IEnumerate.cs b/Toolkit.Foundation/IAggerate.cs
similarity index 71%
rename from Toolkit.Foundation/IEnumerate.cs
rename to Toolkit.Foundation/IAggerate.cs
index 8be8bac..3510f94 100644
--- a/Toolkit.Foundation/IEnumerate.cs
+++ b/Toolkit.Foundation/IAggerate.cs
@@ -1,6 +1,6 @@
 namespace Toolkit.Foundation;
 
-public interface IEnumerate
+public interface IAggerate
 {
     object? Key { get; init; }
 }
diff --git a/Toolkit.Foundation/IPublisher.cs b/Toolkit.Foundation/IPublisher.cs
index c01d127..0a05a60 100644
--- a/Toolkit.Foundation/IPublisher.cs
+++ b/Toolkit.Foundation/IPublisher.cs
@@ -11,10 +11,18 @@ public interface IPublisher
     void Publish<TMessage>(TMessage message,
         object key)
         where TMessage : notnull;
+   
+    void Publish(object message,
+        Func<Func<Task>, Task> marshal,
+        object? key = null);
+
+    void Publish<TMessage>()
+        where TMessage : new();
+
+    void Publish(object message);
 
     void PublishUI<TMessage>(TMessage message,
-        object key)
-        where TMessage : notnull;
+        object key) where TMessage : notnull;
 
     void PublishUI<TMessage>(object key)
         where TMessage : new();
@@ -24,15 +32,6 @@ public interface IPublisher
 
     void PublishUI(object message);
 
-    void Publish(object message,
-        Func<Func<Task>, Task> marshal,
-        object? key = null);
-
     void PublishUI<TMessage>()
         where TMessage : new();
-
-    void Publish<TMessage>()
-        where TMessage : new();
-
-    void Publish(object message);
 }
\ No newline at end of file
diff --git a/Toolkit.Foundation/IServiceCollectionExtensions.cs b/Toolkit.Foundation/IServiceCollectionExtensions.cs
index e53b5c1..370643c 100644
--- a/Toolkit.Foundation/IServiceCollectionExtensions.cs
+++ b/Toolkit.Foundation/IServiceCollectionExtensions.cs
@@ -129,7 +129,8 @@ public static class IServiceCollectionExtensions
     }
 
     public static IServiceCollection AddTemplate<TViewModel, TView>(this IServiceCollection services,
-                        object? key = null,
+        object? key = null,
+        ServiceLifetime serviceLifetime = ServiceLifetime.Transient,
         params object[]? parameters)
     {
         Type viewModelType = typeof(TViewModel);
@@ -137,15 +138,29 @@ public static class IServiceCollectionExtensions
 
         key ??= viewModelType.Name.Replace("ViewModel", "");
 
-        services.AddTransient(viewModelType, provider =>
-            provider.GetRequiredService<IServiceFactory>().Create<TViewModel>(parameters)!);
+        if (parameters is { Length: 0 })
+        {
+            services.Add(new ServiceDescriptor(viewModelType, viewModelType, serviceLifetime));
+        }
+        else
+        {
+            services.Add(new ServiceDescriptor(viewModelType, provider =>
+                provider.GetRequiredService<IServiceFactory>().Create<TViewModel>(parameters)!, serviceLifetime));
+        }
 
-        services.AddTransient(viewType);
+        services.Add(new ServiceDescriptor(viewType, viewType, serviceLifetime));
 
-        services.AddKeyedTransient(viewModelType, key, (provider, key) =>
-            provider.GetRequiredService<IServiceFactory>().Create<TViewModel>(parameters)!);
+        if (parameters is { Length: 0 })
+        {
+            services.Add(new ServiceDescriptor(viewModelType, key, viewModelType, serviceLifetime));
+        }
+        else
+        {
+            services.Add(new ServiceDescriptor(viewModelType, key, (provider, key) =>
+                provider.GetRequiredService<IServiceFactory>().Create<TViewModel>(parameters)!, serviceLifetime));
+        }
 
-        services.AddKeyedTransient(viewType, key);
+        services.Add(new ServiceDescriptor(viewType, key, viewType, serviceLifetime));
 
         services.AddTransient<IContentTemplateDescriptor>(provider =>
             new ContentTemplateDescriptor(key, viewModelType, viewType, parameters));
diff --git a/Toolkit.Foundation/IServiceFactory.cs b/Toolkit.Foundation/IServiceFactory.cs
index c69fb20..5cf1845 100644
--- a/Toolkit.Foundation/IServiceFactory.cs
+++ b/Toolkit.Foundation/IServiceFactory.cs
@@ -4,5 +4,8 @@ public interface IServiceFactory
 {
     object Create(Type type, params object?[]? parameters);
 
+    TService Create<TService>(Action<TService> serviceDelegate,
+        params object?[]? parameters);
+
     TService Create<TService>(params object?[]? parameters);
 }
\ No newline at end of file
diff --git a/Toolkit.Foundation/NotificationAttribute.cs b/Toolkit.Foundation/NotificationAttribute.cs
index cf48a5f..50178f7 100644
--- a/Toolkit.Foundation/NotificationAttribute.cs
+++ b/Toolkit.Foundation/NotificationAttribute.cs
@@ -7,7 +7,7 @@ public class NotificationAttribute(object key) : Attribute
 }
 
 public class EnumerateAttribute(object key,
-    EnumerateMode mode = EnumerateMode.Reset) : NotificationAttribute(key)
+    AggerateMode mode = AggerateMode.Reset) : NotificationAttribute(key)
 {
-    public EnumerateMode Mode => mode;
+    public AggerateMode Mode => mode;
 }
\ No newline at end of file
diff --git a/Toolkit.Foundation/ObservableCollection.cs b/Toolkit.Foundation/ObservableCollection.cs
index 8db9f96..9eb094a 100644
--- a/Toolkit.Foundation/ObservableCollection.cs
+++ b/Toolkit.Foundation/ObservableCollection.cs
@@ -111,6 +111,12 @@ public partial class ObservableCollection<TItem> :
         set => SetItem(index, value);
     }
 
+    public void ResetAndAddRange(Action<ObservableCollection<TItem>> args)
+    {
+        Clear();
+        args.Invoke(this);
+    }
+
     object? IList.this[int index]
     {
         get => collection[index];
@@ -130,24 +136,19 @@ public partial class ObservableCollection<TItem> :
         }
     }
 
-    public TItem Add()
-    {
-        TItem? item = Factory.Create<TItem>();
-
-        Add(item);
-        return item;
-    }
+    public TItem Add() => 
+        Add<TItem>(null, false);
 
     public TItem Add<T>(params object?[] parameters)
-        where T : TItem
-    {
-        T? item = Factory.Create<T>(parameters);
-        Add(item);
+        where T : TItem => Add<T>(null, false, parameters);
 
-        return item;
-    }
+    public TItem Add<T>(IDisposable? owner, 
+        params object?[] parameters)
+        where T : TItem => Add<T>(owner, false, parameters);
 
-    public TItem Add<T>(bool scope = false)
+    public TItem Add<T>(IDisposable? owner = null,
+        bool scope = false,
+        params object?[] parameters)
         where T :
         TItem
     {
@@ -158,9 +159,20 @@ public partial class ObservableCollection<TItem> :
             factory = serviceScope.ServiceProvider.GetRequiredService<IServiceFactory>();
         }
 
-        T? item = factory is not null ? factory.Create<T>() : Factory.Create<T>();
+        T? item = factory is not null ? factory.Create<T>(parameters) : Factory.Create<T>(parameters);
         Add(item);
 
+        if (owner is not null)
+        {
+            Disposer.Add(owner, Disposable.Create(() =>
+            {
+                if (item is IRemovable)
+                {
+                    Remove(item);
+                }
+            }));
+        }
+
         return item;
     }
 
@@ -238,17 +250,17 @@ public partial class ObservableCollection<TItem> :
         Disposer.Dispose(this);
     }
 
-    public void Enumerate()
+    public void Aggerate()
     {
         if (this.GetAttribute<EnumerateAttribute>() is EnumerateAttribute attribute)
         {
-            if (attribute.Mode == EnumerateMode.Reset)
+            if (attribute.Mode == AggerateMode.Reset)
             {
                 Clear();
             }
 
             object? key = this.GetPropertyValue(() => attribute.Key) is { } value ? value : attribute.Key;
-            Publisher.PublishUI(PrepareEnumeration(key));
+            Publisher.PublishUI(OnAggerate(key));
         }
     }
 
@@ -326,7 +338,7 @@ public partial class ObservableCollection<TItem> :
         }
 
         Initialized = true;
-        Enumerate();
+        Aggerate();
 
         return Task.CompletedTask;
     }
@@ -430,8 +442,8 @@ public partial class ObservableCollection<TItem> :
         collection.Insert(index, item);
     }
 
-    protected virtual IEnumerate PrepareEnumeration(object? key) =>
-        new EnumerateEventArgs<TItem>() with { Key = key };
+    protected virtual IAggerate OnAggerate(object? key) =>
+        new AggerateEventArgs<TItem>() with { Key = key };
 
     protected virtual void RemoveItem(int index) =>
         collection.RemoveAt(index);
diff --git a/Toolkit.Foundation/Publisher.cs b/Toolkit.Foundation/Publisher.cs
index cecca5c..0489146 100644
--- a/Toolkit.Foundation/Publisher.cs
+++ b/Toolkit.Foundation/Publisher.cs
@@ -4,13 +4,14 @@ using System.Reflection;
 namespace Toolkit.Foundation;
 
 public class Publisher(IHandlerProvider handlerProvider,
-    IServiceProvider provider,
+    IServiceFactory serviceFactory,
+    IServiceProvider serviceProvider,
     IDispatcher dispatcher) :
     IPublisher
 {
     public void Publish<TMessage>(object key)
         where TMessage : new() =>
-            Publish(new TMessage(), async args => await args(), key);
+            Publish(serviceFactory.Create<TMessage>() ?? new TMessage(), async args => await args(), key);
 
     public void Publish<TMessage>(TMessage message)
         where TMessage : notnull =>
@@ -28,7 +29,7 @@ public class Publisher(IHandlerProvider handlerProvider,
         Type handlerType = typeof(NotificationHandlerWrapper<>)
             .MakeGenericType(notificationType);
 
-        List<object?> handlers = provider.GetServices(handlerType).ToList();
+        List<object?> handlers = serviceProvider.GetServices(handlerType).ToList();
         foreach (object? handler in handlerProvider.Get(notificationType, key))
         {
             handlers.Add(handler);
diff --git a/Toolkit.Foundation/ServiceFactory.cs b/Toolkit.Foundation/ServiceFactory.cs
index d98b2bc..88cd537 100644
--- a/Toolkit.Foundation/ServiceFactory.cs
+++ b/Toolkit.Foundation/ServiceFactory.cs
@@ -6,6 +6,15 @@ public class ServiceFactory(Func<Type, object?[]?, object> factory) :
     public TService Create<TService>(params object?[]? parameters) =>
         (TService)factory(typeof(TService), parameters);
 
+    public TService Create<TService>(Action<TService> serviceDelegate,
+        params object?[]? parameters)
+    {
+        TService service = (TService)factory(typeof(TService), parameters);
+        serviceDelegate.Invoke(service);
+
+        return service;
+    }
+
     public object Create(Type type, params object?[]? parameters) =>
         factory(type, parameters);
 }
\ No newline at end of file