From a4a194e27371a42591ccb53785f9ed7219d51720 Mon Sep 17 00:00:00 2001
From: "N. Taylor Mullen" <nimullen@microsoft.com>
Date: Tue, 18 Apr 2017 13:12:01 -0700
Subject: [PATCH] Make ViewComponentTagHelper discovery resilient to null.

---
 .../DefaultTagHelperResolver.cs                                 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Microsoft.CodeAnalysis.Razor.Workspaces/DefaultTagHelperResolver.cs b/src/Microsoft.CodeAnalysis.Razor.Workspaces/DefaultTagHelperResolver.cs
index e9096e0410..52b53906d9 100644
--- a/src/Microsoft.CodeAnalysis.Razor.Workspaces/DefaultTagHelperResolver.cs
+++ b/src/Microsoft.CodeAnalysis.Razor.Workspaces/DefaultTagHelperResolver.cs
@@ -62,7 +62,7 @@ namespace Microsoft.CodeAnalysis.Razor
             var factory = new ViewComponentTagHelperDescriptorFactory(compilation);
             foreach (var type in types)
             {
-                if (assemblyNameFilters.Contains(type.ContainingAssembly.Identity.Name))
+                if (assemblyNameFilters == null || assemblyNameFilters.Contains(type.ContainingAssembly.Identity.Name))
                 {
                     var descriptor = factory.CreateDescriptor(type);