chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Interactivity/TriggerActionCollection.cs

@@ -1,46 +1,45 @@
 using System;
 using System.Windows;
 
-namespace HandyControl.Interactivity
+namespace HandyControl.Interactivity;
+
+public class TriggerActionCollection : AttachableCollection<TriggerAction>
 {
-    public class TriggerActionCollection : AttachableCollection<TriggerAction>
+    internal TriggerActionCollection()
     {
-        internal TriggerActionCollection()
-        {
-        }
-
-        protected override Freezable CreateInstanceCore()
-        {
-            return new TriggerActionCollection();
-        }
-
-        internal override void ItemAdded(TriggerAction item)
-        {
-            if (item.IsHosted)
-                throw new InvalidOperationException(ExceptionStringTable
-                    .CannotHostTriggerActionMultipleTimesExceptionMessage);
-            if (AssociatedObject != null)
-                item.Attach(AssociatedObject);
-            item.IsHosted = true;
-        }
-
-        internal override void ItemRemoved(TriggerAction item)
-        {
-            if (((IAttachedObject) item).AssociatedObject != null)
-                item.Detach();
-            item.IsHosted = false;
-        }
-
-        protected override void OnAttached()
-        {
-            foreach (var action in this)
-                action.Attach(AssociatedObject);
-        }
-
-        protected override void OnDetaching()
-        {
-            foreach (var action in this)
-                action.Detach();
-        }
     }
-}
+
+    protected override Freezable CreateInstanceCore()
+    {
+        return new TriggerActionCollection();
+    }
+
+    internal override void ItemAdded(TriggerAction item)
+    {
+        if (item.IsHosted)
+            throw new InvalidOperationException(ExceptionStringTable
+                .CannotHostTriggerActionMultipleTimesExceptionMessage);
+        if (AssociatedObject != null)
+            item.Attach(AssociatedObject);
+        item.IsHosted = true;
+    }
+
+    internal override void ItemRemoved(TriggerAction item)
+    {
+        if (((IAttachedObject) item).AssociatedObject != null)
+            item.Detach();
+        item.IsHosted = false;
+    }
+
+    protected override void OnAttached()
+    {
+        foreach (var action in this)
+            action.Attach(AssociatedObject);
+    }
+
+    protected override void OnDetaching()
+    {
+        foreach (var action in this)
+            action.Detach();
+    }
+}