{"action":"created","comment":{"url":"https://api.github.com/repos/aspnet/Razor/pulls/comments/32142268","id":32142268,"diff_hunk":"@@ -0,0 +1,136 @@\n+﻿// Copyright (c) .NET Foundation. All rights reserved.\n+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n+\n+#if !DNXCORE50 // Cannot accurately resolve the location of the documentation XML file in coreclr.\n+using System;\n+using System.Collections.Generic;\n+using System.Globalization;\n+using System.IO;\n+using System.Linq;\n+using System.Reflection;\n+using Microsoft.AspNet.Razor.TagHelpers;\n+using Microsoft.Framework.Internal;\n+\n+namespace Microsoft.AspNet.Razor.Runtime.TagHelpers\n+{\n+    public static class TagHelperUseageDescriptorFactory\n+    {\n+        private static readonly Dictionary<string, XmlDocumentationProvider> XmlDocumentationProviderCache =\n+            new Dictionary<string, XmlDocumentationProvider>(StringComparer.Ordinal);","path":"src/Microsoft.AspNet.Razor.Runtime/TagHelpers/TagHelperUseageDescriptorFactory.cs","position":19,"original_position":19,"commit_id":"bdd8e1b0e0befaf5789cd0d938f9e2efc71200a5","original_commit_id":"bdd8e1b0e0befaf5789cd0d938f9e2efc71200a5","user":{"login":"NTaylorMullen","id":2008729,"avatar_url":"https://avatars.githubusercontent.com/u/2008729?v=3","gravatar_id":"","url":"https://api.github.com/users/NTaylorMullen","html_url":"https://github.com/NTaylorMullen","followers_url":"https://api.github.com/users/NTaylorMullen/followers","following_url":"https://api.github.com/users/NTaylorMullen/following{/other_user}","gists_url":"https://api.github.com/users/NTaylorMullen/gists{/gist_id}","starred_url":"https://api.github.com/users/NTaylorMullen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/NTaylorMullen/subscriptions","organizations_url":"https://api.github.com/users/NTaylorMullen/orgs","repos_url":"https://api.github.com/users/NTaylorMullen/repos","events_url":"https://api.github.com/users/NTaylorMullen/events{/privacy}","received_events_url":"https://api.github.com/users/NTaylorMullen/received_events","type":"User","site_admin":false},"body":"This prevents Razor parsing from going to the file system. We've always pre-emptively added caches for file system like behaviors.","created_at":"2015-06-10T17:21:03Z","updated_at":"2015-06-10T17:21:03Z","html_url":"https://github.com/aspnet/Razor/pull/419#discussion_r32142268","pull_request_url":"https://api.github.com/repos/aspnet/Razor/pulls/419","_links":{"self":{"href":"https://api.github.com/repos/aspnet/Razor/pulls/comments/32142268"},"html":{"href":"https://github.com/aspnet/Razor/pull/419#discussion_r32142268"},"pull_request":{"href":"https://api.github.com/repos/aspnet/Razor/pulls/419"}}},"pull_request":{"url":"https://api.github.com/repos/aspnet/Razor/pulls/419","id":37187433,"html_url":"https://github.com/aspnet/Razor/pull/419","diff_url":"https://github.com/aspnet/Razor/pull/419.diff","patch_url":"https://github.com/aspnet/Razor/pull/419.patch","issue_url":"https://api.github.com/repos/aspnet/Razor/issues/419","number":419,"state":"open","locked":false,"title":"[Design] Add TagHelper documentation resolution to TagHelperDescriptorResolver.","user":{"login":"NTaylorMullen","id":2008729,"avatar_url":"https://avatars.githubusercontent.com/u/2008729?v=3","gravatar_id":"","url":"https://api.github.com/users/NTaylorMullen","html_url":"https://github.com/NTaylorMullen","followers_url":"https://api.github.com/users/NTaylorMullen/followers","following_url":"https://api.github.com/users/NTaylorMullen/following{/other_user}","gists_url":"https://api.github.com/users/NTaylorMullen/gists{/gist_id}","starred_url":"https://api.github.com/users/NTaylorMullen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/NTaylorMullen/subscriptions","organizations_url":"https://api.github.com/users/NTaylorMullen/orgs","repos_url":"https://api.github.com/users/NTaylorMullen/repos","events_url":"https://api.github.com/users/NTaylorMullen/events{/privacy}","received_events_url":"https://api.github.com/users/NTaylorMullen/received_events","type":"User","site_admin":false},"body":"- Added `TagHelperUseageDescriptor` and associated factory for the `TagHelperDescriptorFactory` to utilize.\r\n- `TagHelperUseageDescriptor`s are only created during design time.\r\n- When resolving XML documentation for TagHelpers the XML documentation provider is cached so it can be traversed later without hitting the file system.\r\n- CoreCLR is not supported for XML documentation resolution for now. 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