Merge branch 'master' of https://github.com/microsoft/Dynamics365FO-AppChecker

tools/Explorer/TabControl/Helper.cs

@@ -79,7 +79,11 @@ namespace Wpf.Controls
         public static object CloneElement(object elementToClone)
         {
             string xaml = XamlWriter.Save(elementToClone);
-            return XamlReader.Load(new XmlTextReader(new StringReader(xaml)));
+            return XamlReader.Load(new XmlTextReader(new StringReader(xaml))
+            {
+                XmlResolver = null,
+                DtdProcessing = DtdProcessing.Prohibit
+            });
         }
 
     }

tools/Explorer/Views/SourceEditor.cs

@@ -71,6 +71,9 @@ namespace XppReasoningWpf
 
                 using (var xshd_reader = new XmlTextReader(syntaxModeStream))
                 {
+                    xshd_reader.DtdProcessing = DtdProcessing.Prohibit;
+                    xshd_reader.XmlResolver = null;
+
                     syntaxModeStream = null;
                     return ICSharpCode.AvalonEdit.Highlighting.Xshd.HighlightingLoader.Load(xshd_reader, HighlightingManager.Instance);
                 }