Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.ApplicationServices/Hosting/CustomLoaderAttribute.cs

@@ -0,0 +1,25 @@
+//------------------------------------------------------------------------------
+// <copyright file="CustomLoaderAttribute.cs" company="Microsoft">
+//    Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Hosting {
+    using System;
+
+    // Used to locate a custom loader implementation within a bin-deployed assembly.
+
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = false, Inherited = false)]
+    public sealed class CustomLoaderAttribute : Attribute {
+        public CustomLoaderAttribute(Type customLoaderType) {
+            if (customLoaderType == null) {
+                throw new ArgumentNullException("customLoaderType");
+            }
+
+            // CustomLoaderHelper will verify that the type implements the correct interface.
+            CustomLoaderType = customLoaderType;
+        }
+
+        public Type CustomLoaderType { get; private set; }
+    }
+}