MahApps#2166 add file header

src/MahApps.Metro/Automation/Peers/NumericUpdDownAutomationPeer.cs

@@ -1,26 +1,28 @@
-using System.Windows.Automation;
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using System.Windows.Automation.Peers;
-using System.Windows.Automation.Provider;
 using JetBrains.Annotations;
 using MahApps.Metro.Controls;
 
 namespace MahApps.Metro.Automation.Peers
 {
     public class NumericUpdDownAutomationPeer : FrameworkElementAutomationPeer
     {
-         public NumericUpdDownAutomationPeer([NotNull] NumericUpDown owner)
+        public NumericUpdDownAutomationPeer([NotNull] NumericUpDown owner)
             : base(owner)
         {
         }
+
         protected override string GetClassNameCore()
         {
-            return "NumericUpDown";
+            return nameof(NumericUpDown);
         }
+
         protected override AutomationControlType GetAutomationControlTypeCore()
         {
             return AutomationControlType.Edit;
         }
-
     }
-
-}
+}

src/MahApps.Metro/Controls/NumericUpDown.cs

@@ -17,7 +17,6 @@
 using JetBrains.Annotations;
 using MahApps.Metro.ValueBoxes;
 using MahApps.Metro.Automation.Peers;
-using System.Windows.Automation;
 using System.Windows.Automation.Peers;
 
 namespace MahApps.Metro.Controls