Merge remote-tracking branch 'upstream/master' into healthy-base-url

1 files changed, 2 insertions, 2 deletions

diff --git a/MediaBrowser.Controller/Extensions/StringExtensions.cs b/MediaBrowser.Controller/Extensions/StringExtensions.cs
index 182c8ef65..1853896ee 100644
--- a/MediaBrowser.Controller/Extensions/StringExtensions.cs
+++ b/MediaBrowser.Controller/Extensions/StringExtensions.cs
@@ -1,7 +1,7 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using System;
+using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
 using System.Text;
@@ -34,7 +34,7 @@ namespace MediaBrowser.Controller.Extensions
                 {
                     // will throw if input contains invalid unicode chars
                     // https://mnaoumov.wordpress.com/2014/06/14/stripping-invalid-characters-from-utf-16-strings/
-                    text = Regex.Replace(text, "([\ud800-\udbff](?![\udc00-\udfff]))|((?<![\ud800-\udbff])[\udc00-\udfff])", "");
+                    text = Regex.Replace(text, "([\ud800-\udbff](?![\udc00-\udfff]))|((?<![\ud800-\udbff])[\udc00-\udfff])", string.Empty);
                     return Normalize(text, form, false);
                 }
             }