theme improvements

BrightSharp/Behaviors/WindowMinMaxSizeBehavior.cs

@@ -1,23 +1,22 @@
-using System.Windows;
-using System.Windows.Interactivity;
-using System.Windows.Interop;
+using Microsoft.Xaml.Behaviors;
+using System.Windows;
 
 namespace BrightSharp.Behaviors
 {
     public class WindowMinMaxSizeBehavior : Behavior<Window>
     {
-        private MinMaxSize_Logic logic;
+        private MinMaxSize_Logic _logic;
         protected override void OnAttached()
         {
             base.OnAttached();
-            logic = new MinMaxSize_Logic(AssociatedObject);
-            logic.OnAttached();
+            _logic = new MinMaxSize_Logic(AssociatedObject);
+            _logic.OnAttached();
         }
 
         
         protected override void OnDetaching()
         {
-            logic.OnDetaching();
+            _logic.OnDetaching();
             base.OnDetaching();
         }
     }