Add header to CodeMaid

CodeMaid.config

@@ -549,6 +549,32 @@
                 serializeAs="String">
                 <value>False</value>
             </setting>
+            <setting name="Cleaning_UpdateFileHeaderCSharp" serializeAs="String">
+                <value>#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (c) 2007-2018 ShareX Team
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at &lt;http://www.gnu.org/licenses/&gt;.
+*/
+
+#endregion License Information (GPL v3)</value>
+            </setting>
         </SteveCadwallader.CodeMaid.Properties.Settings>
         <tomenglertde.ResXManager.View.Properties.Settings>
             <setting name="ResourceFilter" serializeAs="String">