diff --git a/MediaBrowser.Model/Dlna/CodecProfile.cs b/MediaBrowser.Model/Dlna/CodecProfile.cs
index 756e500dd7..7bb961deb2 100644
--- a/MediaBrowser.Model/Dlna/CodecProfile.cs
+++ b/MediaBrowser.Model/Dlna/CodecProfile.cs
@@ -1,8 +1,8 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Linq;
 using System.Xml.Serialization;
-using MediaBrowser.Model.Extensions;
 
 namespace MediaBrowser.Model.Dlna
 {
@@ -57,7 +57,7 @@ namespace MediaBrowser.Model.Dlna
 
             foreach (var val in codec)
             {
-                if (ListHelper.ContainsIgnoreCase(codecs, val))
+                if (codecs.Contains(val, StringComparer.OrdinalIgnoreCase))
                 {
                     return true;
                 }
diff --git a/MediaBrowser.Model/Dlna/ConditionProcessor.cs b/MediaBrowser.Model/Dlna/ConditionProcessor.cs
index 7423efaf65..0c3bd88829 100644
--- a/MediaBrowser.Model/Dlna/ConditionProcessor.cs
+++ b/MediaBrowser.Model/Dlna/ConditionProcessor.cs
@@ -1,8 +1,8 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Linq;
 using System.Globalization;
-using MediaBrowser.Model.Extensions;
 using MediaBrowser.Model.MediaInfo;
 
 namespace MediaBrowser.Model.Dlna
@@ -167,9 +167,7 @@ namespace MediaBrowser.Model.Dlna
             switch (condition.Condition)
             {
                 case ProfileConditionType.EqualsAny:
-                    {
-                        return ListHelper.ContainsIgnoreCase(expected.Split('|'), currentValue);
-                    }
+                    return expected.Split('|').Contains(currentValue, StringComparer.OrdinalIgnoreCase);
                 case ProfileConditionType.Equals:
                     return string.Equals(currentValue, expected, StringComparison.OrdinalIgnoreCase);
                 case ProfileConditionType.NotEquals:
diff --git a/MediaBrowser.Model/Dlna/ContainerProfile.cs b/MediaBrowser.Model/Dlna/ContainerProfile.cs
index e6691c5139..cc2417a709 100644
--- a/MediaBrowser.Model/Dlna/ContainerProfile.cs
+++ b/MediaBrowser.Model/Dlna/ContainerProfile.cs
@@ -1,8 +1,8 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Linq;
 using System.Xml.Serialization;
-using MediaBrowser.Model.Extensions;
 
 namespace MediaBrowser.Model.Dlna
 {
@@ -45,7 +45,7 @@ namespace MediaBrowser.Model.Dlna
         public static bool ContainsContainer(string profileContainers, string inputContainer)
         {
             var isNegativeList = false;
-            if (profileContainers != null && profileContainers.StartsWith("-"))
+            if (profileContainers != null && profileContainers.StartsWith("-", StringComparison.Ordinal))
             {
                 isNegativeList = true;
                 profileContainers = profileContainers.Substring(1);
@@ -72,7 +72,7 @@ namespace MediaBrowser.Model.Dlna
 
                 foreach (var container in allInputContainers)
                 {
-                    if (ListHelper.ContainsIgnoreCase(profileContainers, container))
+                    if (profileContainers.Contains(container, StringComparer.OrdinalIgnoreCase))
                     {
                         return false;
                     }
@@ -86,7 +86,7 @@ namespace MediaBrowser.Model.Dlna
 
                 foreach (var container in allInputContainers)
                 {
-                    if (ListHelper.ContainsIgnoreCase(profileContainers, container))
+                    if (profileContainers.Contains(container, StringComparer.OrdinalIgnoreCase))
                     {
                         return true;
                     }
diff --git a/MediaBrowser.Model/Dlna/DeviceProfile.cs b/MediaBrowser.Model/Dlna/DeviceProfile.cs
index 0cefbbe012..3813ac5ebb 100644
--- a/MediaBrowser.Model/Dlna/DeviceProfile.cs
+++ b/MediaBrowser.Model/Dlna/DeviceProfile.cs
@@ -1,8 +1,8 @@
 #pragma warning disable CS1591
 
 using System;
+using System.Linq;
 using System.Xml.Serialization;
-using MediaBrowser.Model.Extensions;
 using MediaBrowser.Model.MediaInfo;
 
 namespace MediaBrowser.Model.Dlna
@@ -93,14 +93,14 @@ namespace MediaBrowser.Model.Dlna
 
         public DeviceProfile()
         {
-            DirectPlayProfiles = new DirectPlayProfile[] { };
-            TranscodingProfiles = new TranscodingProfile[] { };
-            ResponseProfiles = new ResponseProfile[] { };
-            CodecProfiles = new CodecProfile[] { };
-            ContainerProfiles = new ContainerProfile[] { };
+            DirectPlayProfiles = Array.Empty<DirectPlayProfile>();
+            TranscodingProfiles = Array.Empty<TranscodingProfile>();
+            ResponseProfiles = Array.Empty<ResponseProfile>();
+            CodecProfiles = Array.Empty<CodecProfile>();
+            ContainerProfiles = Array.Empty<ContainerProfile>();
             SubtitleProfiles = Array.Empty<SubtitleProfile>();
 
-            XmlRootAttributes = new XmlAttribute[] { };
+            XmlRootAttributes = Array.Empty<XmlAttribute>();
 
             SupportedMediaTypes = "Audio,Photo,Video";
             MaxStreamingBitrate = 8000000;
@@ -129,13 +129,14 @@ namespace MediaBrowser.Model.Dlna
                     continue;
                 }
 
-                if (!ListHelper.ContainsIgnoreCase(i.GetAudioCodecs(), audioCodec ?? string.Empty))
+                if (!i.GetAudioCodecs().Contains(audioCodec ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
                     continue;
                 }
 
                 return i;
             }
+
             return null;
         }
 
@@ -155,7 +156,7 @@ namespace MediaBrowser.Model.Dlna
                     continue;
                 }
 
-                if (!ListHelper.ContainsIgnoreCase(i.GetAudioCodecs(), audioCodec ?? string.Empty))
+                if (!i.GetAudioCodecs().Contains(audioCodec ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
                     continue;
                 }
@@ -185,7 +186,7 @@ namespace MediaBrowser.Model.Dlna
                 }
 
                 var audioCodecs = i.GetAudioCodecs();
-                if (audioCodecs.Length > 0 && !ListHelper.ContainsIgnoreCase(audioCodecs, audioCodec ?? string.Empty))
+                if (audioCodecs.Length > 0 && !audioCodecs.Contains(audioCodec ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
                     continue;
                 }
@@ -288,13 +289,13 @@ namespace MediaBrowser.Model.Dlna
                 }
 
                 var audioCodecs = i.GetAudioCodecs();
-                if (audioCodecs.Length > 0 && !ListHelper.ContainsIgnoreCase(audioCodecs, audioCodec ?? string.Empty))
+                if (audioCodecs.Length > 0 && !audioCodecs.Contains(audioCodec ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
                     continue;
                 }
 
                 var videoCodecs = i.GetVideoCodecs();
-                if (videoCodecs.Length > 0 && !ListHelper.ContainsIgnoreCase(videoCodecs, videoCodec ?? string.Empty))
+                if (videoCodecs.Length > 0 && !videoCodecs.Contains(videoCodec ?? string.Empty, StringComparer.OrdinalIgnoreCase))
                 {
                     continue;
                 }
diff --git a/MediaBrowser.Model/Dlna/SubtitleProfile.cs b/MediaBrowser.Model/Dlna/SubtitleProfile.cs
index 6a8f655ac5..9c28019aad 100644
--- a/MediaBrowser.Model/Dlna/SubtitleProfile.cs
+++ b/MediaBrowser.Model/Dlna/SubtitleProfile.cs
@@ -1,7 +1,8 @@
 #pragma warning disable CS1591
 
+using System;
+using System.Linq;
 using System.Xml.Serialization;
-using MediaBrowser.Model.Extensions;
 
 namespace MediaBrowser.Model.Dlna
 {
@@ -40,7 +41,7 @@ namespace MediaBrowser.Model.Dlna
             }
 
             var languages = GetLanguages();
-            return languages.Length == 0 || ListHelper.ContainsIgnoreCase(languages, subLanguage);
+            return languages.Length == 0 || languages.Contains(subLanguage, StringComparer.OrdinalIgnoreCase);
         }
     }
 }
diff --git a/MediaBrowser.Model/Extensions/ListHelper.cs b/MediaBrowser.Model/Extensions/ListHelper.cs
deleted file mode 100644
index 90ce6f2e5e..0000000000
--- a/MediaBrowser.Model/Extensions/ListHelper.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-#pragma warning disable CS1591
-
-using System;
-
-namespace MediaBrowser.Model.Extensions
-{
-    // TODO: @bond remove
-    public static class ListHelper
-    {
-        public static bool ContainsIgnoreCase(string[] list, string value)
-        {
-            if (value == null)
-            {
-                throw new ArgumentNullException(nameof(value));
-            }
-
-            foreach (var item in list)
-            {
-                if (string.Equals(item, value, StringComparison.OrdinalIgnoreCase))
-                {
-                    return true;
-                }
-            }
-            return false;
-        }
-    }
-}
diff --git a/MediaBrowser.Model/Notifications/NotificationOptions.cs b/MediaBrowser.Model/Notifications/NotificationOptions.cs
index 79a128e9be..9c54bd70e0 100644
--- a/MediaBrowser.Model/Notifications/NotificationOptions.cs
+++ b/MediaBrowser.Model/Notifications/NotificationOptions.cs
@@ -1,7 +1,7 @@
 #pragma warning disable CS1591
 
 using System;
-using MediaBrowser.Model.Extensions;
+using System.Linq;
 using MediaBrowser.Model.Users;
 
 namespace MediaBrowser.Model.Notifications
@@ -81,8 +81,12 @@ namespace MediaBrowser.Model.Notifications
         {
             foreach (NotificationOption i in Options)
             {
-                if (string.Equals(type, i.Type, StringComparison.OrdinalIgnoreCase)) return i;
+                if (string.Equals(type, i.Type, StringComparison.OrdinalIgnoreCase))
+                {
+                    return i;
+                }
             }
+
             return null;
         }
 
@@ -98,7 +102,7 @@ namespace MediaBrowser.Model.Notifications
             NotificationOption opt = GetOptions(notificationType);
 
             return opt == null ||
-                   !ListHelper.ContainsIgnoreCase(opt.DisabledServices, service);
+                   !opt.DisabledServices.Contains(service, StringComparer.OrdinalIgnoreCase);
         }
 
         public bool IsEnabledToMonitorUser(string type, Guid userId)
@@ -106,7 +110,7 @@ namespace MediaBrowser.Model.Notifications
             NotificationOption opt = GetOptions(type);
 
             return opt != null && opt.Enabled &&
-                   !ListHelper.ContainsIgnoreCase(opt.DisabledMonitorUsers, userId.ToString(""));
+                   !opt.DisabledMonitorUsers.Contains(userId.ToString(""), StringComparer.OrdinalIgnoreCase);
         }
 
         public bool IsEnabledToSendToUser(string type, string userId, UserPolicy userPolicy)
@@ -125,7 +129,7 @@ namespace MediaBrowser.Model.Notifications
                     return true;
                 }
 
-                return ListHelper.ContainsIgnoreCase(opt.SendToUsers, userId);
+                return opt.SendToUsers.Contains(userId, StringComparer.OrdinalIgnoreCase);
             }
 
             return false;