Missing header added

ICSharpCode.ILSpyX/Analyzers/Builtin/TypeExtensionMethodsAnalyzer.cs

@@ -1,4 +1,22 @@
-#nullable disable
+// Copyright (c) 2018 Siegfried Pammer
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#nullable disable
 
 using System.Collections.Generic;
 using System.ComponentModel.Composition;

ILSpy/App.xaml.cs

@@ -38,8 +38,6 @@ using Microsoft.VisualStudio.Composition;
 
 using TomsToolbox.Wpf.Styles;
 
-using static System.Windows.Forms.VisualStyles.VisualStyleElement.Window;
-
 namespace ICSharpCode.ILSpy
 {
 	/// <summary>