1 file per class.

src/Windows/Avalonia.Win32/Composition/CompositionBlurHost.cs

@@ -0,0 +1,18 @@
+namespace Avalonia.Win32
+{
+    internal class CompositionBlurHost : IBlurHost
+    {
+        Windows.UI.Composition.Visual _blurVisual;
+
+        public CompositionBlurHost(Windows.UI.Composition.Visual blurVisual)
+        {
+            _blurVisual = blurVisual;
+        }
+
+        public void SetBlur(bool enabled)
+        {
+            _blurVisual.IsVisible = enabled;
+        }
+    }
+}
+

src/Windows/Avalonia.Win32/Composition/CompositionHost.cs

@@ -7,26 +7,6 @@ using WinRT;
 
 namespace Avalonia.Win32
 {
-    internal interface IBlurHost
-    {
-        void SetBlur(bool enabled);
-    }
-
-    internal class CompositionBlurHost : IBlurHost
-    {
-        Windows.UI.Composition.Visual _blurVisual;
-
-        public CompositionBlurHost(Windows.UI.Composition.Visual blurVisual)
-        {
-            _blurVisual = blurVisual;
-        }
-
-        public void SetBlur(bool enabled)
-        {
-            _blurVisual.IsVisible = enabled;
-        }
-    }
-
     class CompositionHost
     {
         internal enum DISPATCHERQUEUE_THREAD_APARTMENTTYPE

src/Windows/Avalonia.Win32/Composition/IBlurHost.cs

@@ -0,0 +1,8 @@
+namespace Avalonia.Win32
+{
+    internal interface IBlurHost
+    {
+        void SetBlur(bool enabled);
+    }
+}
+