diff --git a/src/Forms/Prism.Forms/PrismApplicationBase.cs b/src/Forms/Prism.Forms/PrismApplicationBase.cs
index 3af9466821..b17b8d71c6 100644
--- a/src/Forms/Prism.Forms/PrismApplicationBase.cs
+++ b/src/Forms/Prism.Forms/PrismApplicationBase.cs
@@ -102,7 +102,7 @@ protected virtual void ConfigureViewModelLocator()
         {
             ViewModelLocationProvider.SetDefaultViewModelFactory((view, type) =>
             {
-                List<(Type Type, object Instance)> overrides = new List<(Type, object)>();
+                List<(Type Type, object Instance)> overrides = [];
                 if (Container.IsRegistered<IResolverOverridesHelper>())
                 {
                     var resolver = Container.Resolve<IResolverOverridesHelper>();
@@ -148,8 +148,6 @@ protected virtual void Initialize()
                 PlatformInitializer?.RegisterTypes(_containerExtension);
                 RegisterTypes(_containerExtension);
 
-                _containerExtension.FinalizeExtension();
-
                 _moduleCatalog = Container.Resolve<IModuleCatalog>();
                 ConfigureModuleCatalog(_moduleCatalog);
             }
diff --git a/src/Maui/Prism.Maui/PrismAppBuilder.cs b/src/Maui/Prism.Maui/PrismAppBuilder.cs
index 7a2143e6d8..ccf6eab6f6 100644
--- a/src/Maui/Prism.Maui/PrismAppBuilder.cs
+++ b/src/Maui/Prism.Maui/PrismAppBuilder.cs
@@ -27,12 +27,12 @@ public sealed class PrismAppBuilder
 
     internal PrismAppBuilder(IContainerExtension containerExtension, MauiAppBuilder builder)
     {
-        if (containerExtension is null)
-            throw new ArgumentNullException(nameof(containerExtension));
+        ArgumentNullException.ThrowIfNull(containerExtension);
+        ArgumentNullException.ThrowIfNull(builder);
 
         _container = containerExtension;
-        _registrations = new List<Action<IContainerRegistry>>();
-        _initializations = new List<Action<IContainerProvider>>();
+        _registrations = [];
+        _initializations = [];
 
         ViewModelCreationException.SetViewNameDelegate(view =>
         {
@@ -89,7 +89,7 @@ internal PrismAppBuilder(IContainerExtension containerExtension, MauiAppBuilder
     /// </summary>
     public MauiAppBuilder MauiBuilder { get; }
 
-    private void ConfigureViewModelLocator()
+    private static void ConfigureViewModelLocator()
     {
         ViewModelLocationProvider.SetDefaultViewToViewModelTypeResolver(view =>
         {
diff --git a/src/Uno/Prism.Uno/PrismApplicationBase.cs b/src/Uno/Prism.Uno/PrismApplicationBase.cs
old mode 100755
new mode 100644
index 71dba9e1a7..74b2e47eef
--- a/src/Uno/Prism.Uno/PrismApplicationBase.cs
+++ b/src/Uno/Prism.Uno/PrismApplicationBase.cs
@@ -126,7 +126,6 @@ protected virtual void Initialize(IApplicationBuilder builder)
             _containerExtension.RegisterInstance(builder.Window);
             RegisterRequiredTypes(_containerExtension);
             RegisterTypes(_containerExtension);
-            _containerExtension.FinalizeExtension();
 
             ConfigureModuleCatalog(Container.Resolve<IModuleCatalog>());
 
diff --git a/src/Wpf/Prism.Wpf/PrismApplicationBase.cs b/src/Wpf/Prism.Wpf/PrismApplicationBase.cs
index ce6a615f24..86954c2772 100644
--- a/src/Wpf/Prism.Wpf/PrismApplicationBase.cs
+++ b/src/Wpf/Prism.Wpf/PrismApplicationBase.cs
@@ -61,7 +61,6 @@ protected virtual void Initialize()
             _moduleCatalog = CreateModuleCatalog();
             RegisterRequiredTypes(_containerExtension);
             RegisterTypes(_containerExtension);
-            _containerExtension.FinalizeExtension();
 
             ConfigureModuleCatalog(_moduleCatalog);
 
diff --git a/src/Wpf/Prism.Wpf/PrismBootstrapperBase.cs b/src/Wpf/Prism.Wpf/PrismBootstrapperBase.cs
index e1d9cc386d..5cb14eaef0 100644
--- a/src/Wpf/Prism.Wpf/PrismBootstrapperBase.cs
+++ b/src/Wpf/Prism.Wpf/PrismBootstrapperBase.cs
@@ -58,7 +58,6 @@ protected virtual void Initialize()
             _moduleCatalog = CreateModuleCatalog();
             RegisterRequiredTypes(_containerExtension);
             RegisterTypes(_containerExtension);
-            _containerExtension.FinalizeExtension();
 
             ConfigureModuleCatalog(_moduleCatalog);