Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1587-6.cs

@@ -0,0 +1,15 @@
+// CS1587: XML comment is not placed on a valid language element
+// Line: 8
+// Compiler options: -doc:dummy.xml -warnaserror -warn:2
+
+using System;
+
+/// invalid comment on using alias directive.
+using Hoge = System.Xml.XmlDocument;
+
+namespace TopNS
+{
+
+	enum Foo {
+	}
+}