Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Compilation/IgnoreFileBuildProvider.cs

@@ -0,0 +1,26 @@
+//------------------------------------------------------------------------------
+// <copyright file="IgnoreFileBuildProvider.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+
+
+namespace System.Web.Compilation {
+
+using System;
+using System.Web.Util;
+
+// This is a marker class that causes files to be ignored by the compilation system.
+// Otherwise, if no build provider is registered, unknown extensions get treated as
+// static files and copied during deployment precompilation.  This provider prevents
+// files from being copied. (DevDiv 35450)
+internal class IgnoreFileBuildProvider: BuildProvider {
+
+    internal IgnoreFileBuildProvider() {
+        // Since it's just a marker, it should never be instantiated
+        Debug.Assert(false);
+    }
+
+}
+}