Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/System.Web.Mvc3/Mvc/PreApplicationStartCode.cs

@@ -0,0 +1,22 @@
+namespace System.Web.Mvc {
+    using System.ComponentModel;
+    using System.Web.WebPages.Scope;
+
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static class PreApplicationStartCode {
+        private static bool _startWasCalled;
+
+        public static void Start() {
+            // Guard against multiple calls. All Start calls are made on same thread, so no lock needed here
+            if (_startWasCalled) {
+                return;
+            }
+            _startWasCalled = true;
+
+            System.Web.WebPages.Razor.PreApplicationStartCode.Start();
+            System.Web.WebPages.PreApplicationStartCode.Start();
+
+            ViewContext.GlobalScopeThunk = () => ScopeStorage.CurrentScope;
+        }
+    }
+}