From b4cf3ed0713ffbdea87bd3dd9aa87311c7dc3537 Mon Sep 17 00:00:00 2001
From: Javier Calvarro Nelson <jacalvar@microsoft.com>
Date: Wed, 14 Feb 2018 13:41:31 -0800
Subject: [PATCH] [Fixes #1628] Avoid stomping on an existing FileProvider

Respects the existing one if it's there.
---
 src/UI/IdentityDefaultUIConfigureOptions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/UI/IdentityDefaultUIConfigureOptions.cs b/src/UI/IdentityDefaultUIConfigureOptions.cs
index 317ecd8275..9d0f4effbc 100644
--- a/src/UI/IdentityDefaultUIConfigureOptions.cs
+++ b/src/UI/IdentityDefaultUIConfigureOptions.cs
@@ -59,7 +59,7 @@ namespace Microsoft.AspNetCore.Identity.UI
                 throw new InvalidOperationException("Missing FileProvider.");
             }
 
-            options.FileProvider = Environment.WebRootFileProvider;
+            options.FileProvider = options.FileProvider ?? Environment.WebRootFileProvider;
 
             // Add our provider
             var filesProvider = new ManifestEmbeddedFileProvider(GetType().Assembly, "wwwroot");