Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/src/System.Web.Http/HttpPostAttribute.cs

@@ -0,0 +1,22 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+using System.Collections.ObjectModel;
+using System.Net.Http;
+using System.Web.Http.Controllers;
+
+namespace System.Web.Http
+{
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
+    public sealed class HttpPostAttribute : Attribute, IActionHttpMethodProvider
+    {
+        private static readonly Collection<HttpMethod> _supportedMethods = new Collection<HttpMethod>(new HttpMethod[] { HttpMethod.Post });
+
+        public Collection<HttpMethod> HttpMethods
+        {
+            get
+            {
+                return _supportedMethods;
+            }
+        }
+    }
+}