diff --git a/Emby.Dlna/Main/DlnaEntryPoint.cs b/Emby.Dlna/Main/DlnaEntryPoint.cs
deleted file mode 100644
index dbc47d9816..0000000000
--- a/Emby.Dlna/Main/DlnaEntryPoint.cs
+++ /dev/null
@@ -1,363 +0,0 @@
-#nullable disable
-
-#pragma warning disable CS1591
-
-using System;
-using System.Globalization;
-using System.Linq;
-using System.Net.Http;
-using System.Net.Sockets;
-using System.Threading.Tasks;
-using Emby.Dlna.PlayTo;
-using Emby.Dlna.Ssdp;
-using Jellyfin.Networking.Configuration;
-using Jellyfin.Networking.Extensions;
-using MediaBrowser.Common.Configuration;
-using MediaBrowser.Common.Extensions;
-using MediaBrowser.Common.Net;
-using MediaBrowser.Controller;
-using MediaBrowser.Controller.Configuration;
-using MediaBrowser.Controller.Dlna;
-using MediaBrowser.Controller.Drawing;
-using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.MediaEncoding;
-using MediaBrowser.Controller.Plugins;
-using MediaBrowser.Controller.Session;
-using MediaBrowser.Model.Dlna;
-using MediaBrowser.Model.Globalization;
-using Microsoft.Extensions.Logging;
-using Rssdp;
-using Rssdp.Infrastructure;
-
-namespace Emby.Dlna.Main
-{
-    public sealed class DlnaEntryPoint : IServerEntryPoint, IRunBeforeStartup
-    {
-        private readonly IServerConfigurationManager _config;
-        private readonly ILogger<DlnaEntryPoint> _logger;
-        private readonly IServerApplicationHost _appHost;
-        private readonly ISessionManager _sessionManager;
-        private readonly IHttpClientFactory _httpClientFactory;
-        private readonly ILibraryManager _libraryManager;
-        private readonly IUserManager _userManager;
-        private readonly IDlnaManager _dlnaManager;
-        private readonly IImageProcessor _imageProcessor;
-        private readonly IUserDataManager _userDataManager;
-        private readonly ILocalizationManager _localization;
-        private readonly IMediaSourceManager _mediaSourceManager;
-        private readonly IMediaEncoder _mediaEncoder;
-        private readonly IDeviceDiscovery _deviceDiscovery;
-        private readonly ISsdpCommunicationsServer _communicationsServer;
-        private readonly INetworkManager _networkManager;
-        private readonly object _syncLock = new();
-        private readonly bool _disabled;
-
-        private PlayToManager _manager;
-        private SsdpDevicePublisher _publisher;
-
-        private bool _disposed;
-
-        public DlnaEntryPoint(
-            IServerConfigurationManager config,
-            ILoggerFactory loggerFactory,
-            IServerApplicationHost appHost,
-            ISessionManager sessionManager,
-            IHttpClientFactory httpClientFactory,
-            ILibraryManager libraryManager,
-            IUserManager userManager,
-            IDlnaManager dlnaManager,
-            IImageProcessor imageProcessor,
-            IUserDataManager userDataManager,
-            ILocalizationManager localizationManager,
-            IMediaSourceManager mediaSourceManager,
-            IDeviceDiscovery deviceDiscovery,
-            IMediaEncoder mediaEncoder,
-            ISsdpCommunicationsServer communicationsServer,
-            INetworkManager networkManager)
-        {
-            _config = config;
-            _appHost = appHost;
-            _sessionManager = sessionManager;
-            _httpClientFactory = httpClientFactory;
-            _libraryManager = libraryManager;
-            _userManager = userManager;
-            _dlnaManager = dlnaManager;
-            _imageProcessor = imageProcessor;
-            _userDataManager = userDataManager;
-            _localization = localizationManager;
-            _mediaSourceManager = mediaSourceManager;
-            _deviceDiscovery = deviceDiscovery;
-            _mediaEncoder = mediaEncoder;
-            _communicationsServer = communicationsServer;
-            _networkManager = networkManager;
-            _logger = loggerFactory.CreateLogger<DlnaEntryPoint>();
-
-            var netConfig = config.GetConfiguration<NetworkConfiguration>(NetworkConfigurationStore.StoreKey);
-            _disabled = appHost.ListenWithHttps && netConfig.RequireHttps;
-
-            if (_disabled && _config.GetDlnaConfiguration().EnableServer)
-            {
-                _logger.LogError("The DLNA specification does not support HTTPS.");
-            }
-        }
-
-        public async Task RunAsync()
-        {
-            await ((DlnaManager)_dlnaManager).InitProfilesAsync().ConfigureAwait(false);
-
-            if (_disabled)
-            {
-                // No use starting as dlna won't work, as we're running purely on HTTPS.
-                return;
-            }
-
-            ReloadComponents();
-
-            _config.NamedConfigurationUpdated += OnNamedConfigurationUpdated;
-        }
-
-        private void OnNamedConfigurationUpdated(object sender, ConfigurationUpdateEventArgs e)
-        {
-            if (string.Equals(e.Key, "dlna", StringComparison.OrdinalIgnoreCase))
-            {
-                ReloadComponents();
-            }
-        }
-
-        private void ReloadComponents()
-        {
-            var options = _config.GetDlnaConfiguration();
-            StartDeviceDiscovery();
-
-            if (options.EnableServer)
-            {
-                StartDevicePublisher(options);
-            }
-            else
-            {
-                DisposeDevicePublisher();
-            }
-
-            if (options.EnablePlayTo)
-            {
-                StartPlayToManager();
-            }
-            else
-            {
-                DisposePlayToManager();
-            }
-        }
-
-        private void StartDeviceDiscovery()
-        {
-            try
-            {
-                ((DeviceDiscovery)_deviceDiscovery).Start(_communicationsServer);
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex, "Error starting device discovery");
-            }
-        }
-
-        public void StartDevicePublisher(Configuration.DlnaOptions options)
-        {
-            if (_publisher is not null)
-            {
-                return;
-            }
-
-            try
-            {
-                _publisher = new SsdpDevicePublisher(
-                    _communicationsServer,
-                    Environment.OSVersion.Platform.ToString(),
-                    // Can not use VersionString here since that includes OS and version
-                    Environment.OSVersion.Version.ToString(),
-                    _config.GetDlnaConfiguration().SendOnlyMatchedHost)
-                {
-                    LogFunction = (msg) => _logger.LogDebug("{Msg}", msg),
-                    SupportPnpRootDevice = false
-                };
-
-                RegisterServerEndpoints();
-
-                if (options.BlastAliveMessages)
-                {
-                    _publisher.StartSendingAliveNotifications(TimeSpan.FromSeconds(options.BlastAliveMessageIntervalSeconds));
-                }
-            }
-            catch (Exception ex)
-            {
-                _logger.LogError(ex, "Error registering endpoint");
-            }
-        }
-
-        private void RegisterServerEndpoints()
-        {
-            var udn = CreateUuid(_appHost.SystemId);
-            var descriptorUri = "/dlna/" + udn + "/description.xml";
-
-            // Only get bind addresses in LAN
-            // IPv6 is currently unsupported
-            var validInterfaces = _networkManager.GetInternalBindAddresses()
-                .Where(x => x.Address is not null)
-                .Where(x => x.AddressFamily != AddressFamily.InterNetworkV6)
-                .ToList();
-
-            if (validInterfaces.Count == 0)
-            {
-                // No interfaces returned, fall back to loopback
-                validInterfaces = _networkManager.GetLoopbacks().ToList();
-            }
-
-            foreach (var intf in validInterfaces)
-            {
-                var fullService = "urn:schemas-upnp-org:device:MediaServer:1";
-
-                _logger.LogInformation("Registering publisher for {ResourceName} on {DeviceAddress}", fullService, intf.Address);
-
-                var uri = new UriBuilder(_appHost.GetApiUrlForLocalAccess(intf.Address, false) + descriptorUri);
-
-                var device = new SsdpRootDevice
-                {
-                    CacheLifetime = TimeSpan.FromSeconds(1800), // How long SSDP clients can cache this info.
-                    Location = uri.Uri, // Must point to the URL that serves your devices UPnP description document.
-                    Address = intf.Address,
-                    PrefixLength = NetworkExtensions.MaskToCidr(intf.Subnet.BaseAddress),
-                    FriendlyName = "Jellyfin",
-                    Manufacturer = "Jellyfin",
-                    ModelName = "Jellyfin Server",
-                    Uuid = udn
-                    // This must be a globally unique value that survives reboots etc. Get from storage or embedded hardware etc.
-                };
-
-                SetProperties(device, fullService);
-                _publisher.AddDevice(device);
-
-                var embeddedDevices = new[]
-                {
-                    "urn:schemas-upnp-org:service:ContentDirectory:1",
-                    "urn:schemas-upnp-org:service:ConnectionManager:1",
-                    // "urn:microsoft.com:service:X_MS_MediaReceiverRegistrar:1"
-                };
-
-                foreach (var subDevice in embeddedDevices)
-                {
-                    var embeddedDevice = new SsdpEmbeddedDevice
-                    {
-                        FriendlyName = device.FriendlyName,
-                        Manufacturer = device.Manufacturer,
-                        ModelName = device.ModelName,
-                        Uuid = udn
-                        // This must be a globally unique value that survives reboots etc. Get from storage or embedded hardware etc.
-                    };
-
-                    SetProperties(embeddedDevice, subDevice);
-                    device.AddDevice(embeddedDevice);
-                }
-            }
-        }
-
-        private static string CreateUuid(string text)
-        {
-            if (!Guid.TryParse(text, out var guid))
-            {
-                guid = text.GetMD5();
-            }
-
-            return guid.ToString("D", CultureInfo.InvariantCulture);
-        }
-
-        private static void SetProperties(SsdpDevice device, string fullDeviceType)
-        {
-            var serviceParts = fullDeviceType
-                .Replace("urn:", string.Empty, StringComparison.OrdinalIgnoreCase)
-                .Replace(":1", string.Empty, StringComparison.OrdinalIgnoreCase)
-                .Split(':');
-
-            device.DeviceTypeNamespace = serviceParts[0].Replace('.', '-');
-            device.DeviceClass = serviceParts[1];
-            device.DeviceType = serviceParts[2];
-        }
-
-        private void StartPlayToManager()
-        {
-            lock (_syncLock)
-            {
-                if (_manager is not null)
-                {
-                    return;
-                }
-
-                try
-                {
-                    _manager = new PlayToManager(
-                        _logger,
-                        _sessionManager,
-                        _libraryManager,
-                        _userManager,
-                        _dlnaManager,
-                        _appHost,
-                        _imageProcessor,
-                        _deviceDiscovery,
-                        _httpClientFactory,
-                        _userDataManager,
-                        _localization,
-                        _mediaSourceManager,
-                        _mediaEncoder);
-
-                    _manager.Start();
-                }
-                catch (Exception ex)
-                {
-                    _logger.LogError(ex, "Error starting PlayTo manager");
-                }
-            }
-        }
-
-        private void DisposePlayToManager()
-        {
-            lock (_syncLock)
-            {
-                if (_manager is not null)
-                {
-                    try
-                    {
-                        _logger.LogInformation("Disposing PlayToManager");
-                        _manager.Dispose();
-                    }
-                    catch (Exception ex)
-                    {
-                        _logger.LogError(ex, "Error disposing PlayTo manager");
-                    }
-
-                    _manager = null;
-                }
-            }
-        }
-
-        public void DisposeDevicePublisher()
-        {
-            if (_publisher is not null)
-            {
-                _logger.LogInformation("Disposing SsdpDevicePublisher");
-                _publisher.Dispose();
-                _publisher = null;
-            }
-        }
-
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            if (_disposed)
-            {
-                return;
-            }
-
-            DisposeDevicePublisher();
-            DisposePlayToManager();
-            _disposed = true;
-        }
-    }
-}
diff --git a/Jellyfin.Api/Controllers/EnvironmentController.cs b/Jellyfin.Api/Controllers/EnvironmentController.cs
index e0713cf054..284a97621d 100644
--- a/Jellyfin.Api/Controllers/EnvironmentController.cs
+++ b/Jellyfin.Api/Controllers/EnvironmentController.cs
@@ -169,7 +169,7 @@ public class EnvironmentController : BaseJellyfinApiController
             // Check if unc share
             var index = path.LastIndexOf(UncSeparator);
 
-            if (index != -1 && path.IndexOf(UncSeparator, StringComparison.OrdinalIgnoreCase) == 0)
+            if (index != -1 && path[0] == UncSeparator)
             {
                 parent = path.Substring(0, index);
 
diff --git a/Jellyfin.Api/Controllers/HlsSegmentController.cs b/Jellyfin.Api/Controllers/HlsSegmentController.cs
index 6eedfd8c7f..392d9955fb 100644
--- a/Jellyfin.Api/Controllers/HlsSegmentController.cs
+++ b/Jellyfin.Api/Controllers/HlsSegmentController.cs
@@ -160,7 +160,7 @@ public class HlsSegmentController : BaseJellyfinApiController
             var pathExtension = Path.GetExtension(path);
             if ((string.Equals(pathExtension, segmentContainer, StringComparison.OrdinalIgnoreCase)
                  || string.Equals(pathExtension, ".m3u8", StringComparison.OrdinalIgnoreCase))
-                && path.IndexOf(normalizedPlaylistId, StringComparison.OrdinalIgnoreCase) != -1)
+                && path.Contains(normalizedPlaylistId, StringComparison.OrdinalIgnoreCase))
             {
                 playlistPath = path;
                 break;
diff --git a/Jellyfin.Api/Controllers/ImageController.cs b/Jellyfin.Api/Controllers/ImageController.cs
index 7d1a54eced..c031ce338d 100644
--- a/Jellyfin.Api/Controllers/ImageController.cs
+++ b/Jellyfin.Api/Controllers/ImageController.cs
@@ -80,7 +80,7 @@ public class ImageController : BaseJellyfinApiController
         _appPaths = appPaths;
     }
 
-    private static Stream GetFromBase64Stream(Stream inputStream)
+    private static CryptoStream GetFromBase64Stream(Stream inputStream)
         => new CryptoStream(inputStream, new FromBase64Transform(), CryptoStreamMode.Read);
 
     /// <summary>
diff --git a/Jellyfin.Api/Controllers/MusicGenresController.cs b/Jellyfin.Api/Controllers/MusicGenresController.cs
index 94c8993575..69b9042646 100644
--- a/Jellyfin.Api/Controllers/MusicGenresController.cs
+++ b/Jellyfin.Api/Controllers/MusicGenresController.cs
@@ -150,7 +150,7 @@ public class MusicGenresController : BaseJellyfinApiController
 
         MusicGenre? item;
 
-        if (genreName.IndexOf(BaseItem.SlugChar, StringComparison.OrdinalIgnoreCase) != -1)
+        if (genreName.Contains(BaseItem.SlugChar, StringComparison.OrdinalIgnoreCase))
         {
             item = GetItemFromSlugName<MusicGenre>(_libraryManager, genreName, dtoOptions, BaseItemKind.MusicGenre);
         }
diff --git a/Jellyfin.Api/Extensions/DtoExtensions.cs b/Jellyfin.Api/Extensions/DtoExtensions.cs
index 2d7a56d913..7d9823c25c 100644
--- a/Jellyfin.Api/Extensions/DtoExtensions.cs
+++ b/Jellyfin.Api/Extensions/DtoExtensions.cs
@@ -38,10 +38,10 @@ public static class DtoExtensions
 
         if (!dtoOptions.ContainsField(ItemFields.RecursiveItemCount))
         {
-            if (client.IndexOf("kodi", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("wmc", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("media center", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("classic", StringComparison.OrdinalIgnoreCase) != -1)
+            if (client.Contains("kodi", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("wmc", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("media center", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("classic", StringComparison.OrdinalIgnoreCase))
             {
                 int oldLen = dtoOptions.Fields.Count;
                 var arr = new ItemFields[oldLen + 1];
@@ -53,13 +53,13 @@ public static class DtoExtensions
 
         if (!dtoOptions.ContainsField(ItemFields.ChildCount))
         {
-            if (client.IndexOf("kodi", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("wmc", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("media center", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("classic", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("roku", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("samsung", StringComparison.OrdinalIgnoreCase) != -1 ||
-                client.IndexOf("androidtv", StringComparison.OrdinalIgnoreCase) != -1)
+            if (client.Contains("kodi", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("wmc", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("media center", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("classic", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("roku", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("samsung", StringComparison.OrdinalIgnoreCase) ||
+                client.Contains("androidtv", StringComparison.OrdinalIgnoreCase))
             {
                 int oldLen = dtoOptions.Fields.Count;
                 var arr = new ItemFields[oldLen + 1];
diff --git a/Jellyfin.Api/Helpers/HlsHelpers.cs b/Jellyfin.Api/Helpers/HlsHelpers.cs
index 2155e305da..e2d3bfb193 100644
--- a/Jellyfin.Api/Helpers/HlsHelpers.cs
+++ b/Jellyfin.Api/Helpers/HlsHelpers.cs
@@ -53,7 +53,7 @@ public static class HlsHelpers
                             break;
                         }
 
-                        if (line.IndexOf("#EXTINF:", StringComparison.OrdinalIgnoreCase) != -1)
+                        if (line.Contains("#EXTINF:", StringComparison.OrdinalIgnoreCase))
                         {
                             count++;
                             if (count >= segmentCount)
diff --git a/Jellyfin.Api/Helpers/TranscodingJobHelper.cs b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
index 5b407e4a95..77d3edbd65 100644
--- a/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
+++ b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
@@ -405,7 +405,7 @@ public class TranscodingJobHelper : IDisposable
         var name = Path.GetFileNameWithoutExtension(outputFilePath);
 
         var filesToDelete = _fileSystem.GetFilePaths(directory)
-            .Where(f => f.IndexOf(name, StringComparison.OrdinalIgnoreCase) != -1);
+            .Where(f => f.Contains(name, StringComparison.OrdinalIgnoreCase));
 
         List<Exception>? exs = null;
         foreach (var file in filesToDelete)
diff --git a/Jellyfin.Api/Models/StreamingDtos/StreamState.cs b/Jellyfin.Api/Models/StreamingDtos/StreamState.cs
index b75272d3f6..f249f3bc6c 100644
--- a/Jellyfin.Api/Models/StreamingDtos/StreamState.cs
+++ b/Jellyfin.Api/Models/StreamingDtos/StreamState.cs
@@ -86,11 +86,11 @@ public class StreamState : EncodingJobInfo, IDisposable
             {
                 var userAgent = UserAgent ?? string.Empty;
 
-                if (userAgent.IndexOf("AppleTV", StringComparison.OrdinalIgnoreCase) != -1
-                    || userAgent.IndexOf("cfnetwork", StringComparison.OrdinalIgnoreCase) != -1
-                    || userAgent.IndexOf("ipad", StringComparison.OrdinalIgnoreCase) != -1
-                    || userAgent.IndexOf("iphone", StringComparison.OrdinalIgnoreCase) != -1
-                    || userAgent.IndexOf("ipod", StringComparison.OrdinalIgnoreCase) != -1)
+                if (userAgent.Contains("AppleTV", StringComparison.OrdinalIgnoreCase)
+                    || userAgent.Contains("cfnetwork", StringComparison.OrdinalIgnoreCase)
+                    || userAgent.Contains("ipad", StringComparison.OrdinalIgnoreCase)
+                    || userAgent.Contains("iphone", StringComparison.OrdinalIgnoreCase)
+                    || userAgent.Contains("ipod", StringComparison.OrdinalIgnoreCase))
                 {
                     return 6;
                 }
diff --git a/Jellyfin.Networking/Manager/NetworkManager.cs b/Jellyfin.Networking/Manager/NetworkManager.cs
index dbf7127a68..749e0abbbe 100644
--- a/Jellyfin.Networking/Manager/NetworkManager.cs
+++ b/Jellyfin.Networking/Manager/NetworkManager.cs
@@ -11,10 +11,12 @@ using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Model.Net;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 using static MediaBrowser.Controller.Extensions.ConfigurationExtensions;
 using IConfigurationManager = MediaBrowser.Common.Configuration.IConfigurationManager;
+using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
 
 namespace Jellyfin.Networking.Manager
 {
@@ -530,7 +532,7 @@ namespace Jellyfin.Networking.Manager
                     {
                         foreach (var lan in _lanSubnets)
                         {
-                            var lanPrefix = lan.BaseAddress;
+                            var lanPrefix = lan.Prefix;
                             publishedServerUrls.Add(
                                 new PublishedServerUriOverride(
                                     new IPData(lanPrefix, new IPNetwork(lanPrefix, lan.PrefixLength)),
@@ -541,7 +543,7 @@ namespace Jellyfin.Networking.Manager
                     }
                     else if (NetworkUtils.TryParseToSubnet(identifier, out var result) && result is not null)
                     {
-                        var data = new IPData(result.Value.BaseAddress, result);
+                        var data = new IPData(result.Prefix, result);
                         publishedServerUrls.Add(
                             new PublishedServerUriOverride(
                                 data,
@@ -607,11 +609,11 @@ namespace Jellyfin.Networking.Manager
                     var parts = details.Split(',');
                     if (NetworkUtils.TryParseToSubnet(parts[0], out var subnet))
                     {
-                        var address = subnet.Value.BaseAddress;
+                        var address = subnet.Prefix;
                         var index = int.Parse(parts[1], CultureInfo.InvariantCulture);
                         if (address.AddressFamily == AddressFamily.InterNetwork || address.AddressFamily == AddressFamily.InterNetworkV6)
                         {
-                            var data = new IPData(address, subnet.Value, parts[2])
+                            var data = new IPData(address, subnet, parts[2])
                             {
                                 Index = index
                             };
@@ -881,7 +883,7 @@ namespace Jellyfin.Networking.Manager
         {
             if (NetworkUtils.TryParseToSubnet(address, out var subnet))
             {
-                return IPAddress.IsLoopback(subnet.Value.BaseAddress) || (_lanSubnets.Any(x => x.Contains(subnet.Value.BaseAddress)) && !_excludedSubnets.Any(x => x.Contains(subnet.Value.BaseAddress)));
+                return IPAddress.IsLoopback(subnet.Prefix) || (_lanSubnets.Any(x => x.Contains(subnet.Prefix)) && !_excludedSubnets.Any(x => x.Contains(subnet.Prefix)));
             }
 
             if (NetworkUtils.TryParseHost(address, out var addresses, IsIPv4Enabled, IsIPv6Enabled))
@@ -1112,12 +1114,12 @@ namespace Jellyfin.Networking.Manager
             var logLevel = debug ? LogLevel.Debug : LogLevel.Information;
             if (_logger.IsEnabled(logLevel))
             {
-                _logger.Log(logLevel, "Defined LAN addresses: {0}", _lanSubnets.Select(s => s.BaseAddress + "/" + s.PrefixLength));
-                _logger.Log(logLevel, "Defined LAN exclusions: {0}", _excludedSubnets.Select(s => s.BaseAddress + "/" + s.PrefixLength));
-                _logger.Log(logLevel, "Using LAN addresses: {0}", _lanSubnets.Where(s => !_excludedSubnets.Contains(s)).Select(s => s.BaseAddress + "/" + s.PrefixLength));
+                _logger.Log(logLevel, "Defined LAN addresses: {0}", _lanSubnets.Select(s => s.Prefix + "/" + s.PrefixLength));
+                _logger.Log(logLevel, "Defined LAN exclusions: {0}", _excludedSubnets.Select(s => s.Prefix + "/" + s.PrefixLength));
+                _logger.Log(logLevel, "Using LAN addresses: {0}", _lanSubnets.Where(s => !_excludedSubnets.Contains(s)).Select(s => s.Prefix + "/" + s.PrefixLength));
                 _logger.Log(logLevel, "Using bind addresses: {0}", _interfaces.OrderByDescending(x => x.AddressFamily == AddressFamily.InterNetwork).Select(x => x.Address));
                 _logger.Log(logLevel, "Remote IP filter is {0}", config.IsRemoteIPFilterBlacklist ? "Blocklist" : "Allowlist");
-                _logger.Log(logLevel, "Filter list: {0}", _remoteAddressFilter.Select(s => s.BaseAddress + "/" + s.PrefixLength));
+                _logger.Log(logLevel, "Filter list: {0}", _remoteAddressFilter.Select(s => s.Prefix + "/" + s.PrefixLength));
             }
         }
     }
diff --git a/Jellyfin.Server.Implementations/Users/UserManager.cs b/Jellyfin.Server.Implementations/Users/UserManager.cs
index 075f4cb3a1..990b9a5bd4 100644
--- a/Jellyfin.Server.Implementations/Users/UserManager.cs
+++ b/Jellyfin.Server.Implementations/Users/UserManager.cs
@@ -748,7 +748,7 @@ namespace Jellyfin.Server.Implementations.Users
             return GetPasswordResetProviders(user)[0];
         }
 
-        private IList<IAuthenticationProvider> GetAuthenticationProviders(User? user)
+        private List<IAuthenticationProvider> GetAuthenticationProviders(User? user)
         {
             var authenticationProviderId = user?.AuthenticationProviderId;
 
diff --git a/Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs b/Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs
index 92c483c0fe..46df173bfb 100644
--- a/Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs
+++ b/Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs
@@ -279,9 +279,9 @@ namespace Jellyfin.Server.Extensions
                 }
                 else if (NetworkUtils.TryParseToSubnet(allowedProxies[i], out var subnet))
                 {
-                    if (subnet.HasValue)
+                    if (subnet is not null)
                     {
-                        AddIPAddress(config, options, subnet.Value.BaseAddress, subnet.Value.PrefixLength);
+                        AddIPAddress(config, options, subnet.Prefix, subnet.PrefixLength);
                     }
                 }
                 else if (NetworkUtils.TryParseHost(allowedProxies[i], out var addresses, config.EnableIPv4, config.EnableIPv6))
diff --git a/Jellyfin.Server/Program.cs b/Jellyfin.Server/Program.cs
index f9259d0d92..c70ef17197 100644
--- a/Jellyfin.Server/Program.cs
+++ b/Jellyfin.Server/Program.cs
@@ -40,7 +40,7 @@ namespace Jellyfin.Server
         /// </summary>
         public const string LoggingConfigFileSystem = "logging.json";
 
-        private static readonly ILoggerFactory _loggerFactory = new SerilogLoggerFactory();
+        private static readonly SerilogLoggerFactory _loggerFactory = new SerilogLoggerFactory();
         private static long _startTimestamp;
         private static ILogger _logger = NullLogger.Instance;
         private static bool _restartOnShutdown;
diff --git a/Jellyfin.Server/Startup.cs b/Jellyfin.Server/Startup.cs
index 18d13c0563..49f5bf232c 100644
--- a/Jellyfin.Server/Startup.cs
+++ b/Jellyfin.Server/Startup.cs
@@ -35,7 +35,7 @@ namespace Jellyfin.Server
     /// </summary>
     public class Startup
     {
-        private readonly IServerApplicationHost _serverApplicationHost;
+        private readonly CoreAppHost _serverApplicationHost;
         private readonly IServerConfigurationManager _serverConfigurationManager;
 
         /// <summary>
diff --git a/MediaBrowser.Common/Net/NetworkConstants.cs b/MediaBrowser.Common/Net/NetworkConstants.cs
index fe7ab89632..b18058fa96 100644
--- a/MediaBrowser.Common/Net/NetworkConstants.cs
+++ b/MediaBrowser.Common/Net/NetworkConstants.cs
@@ -1,4 +1,5 @@
 using System.Net;
+using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
 
 namespace MediaBrowser.Common.Net;
 
diff --git a/MediaBrowser.Common/Net/NetworkUtils.cs b/MediaBrowser.Common/Net/NetworkUtils.cs
index 7ae99336f1..4110b000e5 100644
--- a/MediaBrowser.Common/Net/NetworkUtils.cs
+++ b/MediaBrowser.Common/Net/NetworkUtils.cs
@@ -5,8 +5,7 @@ using System.Net;
 using System.Net.Sockets;
 using System.Text.RegularExpressions;
 using Jellyfin.Extensions;
-using Jellyfin.Networking.Constants;
-using Microsoft.AspNetCore.HttpOverrides;
+using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
 
 namespace MediaBrowser.Common.Net;
 
@@ -180,7 +179,7 @@ public static partial class NetworkUtils
         {
             if (TryParseToSubnet(values[a], out var innerResult, negated))
             {
-                tmpResult.Add(innerResult.Value);
+                tmpResult.Add(innerResult);
             }
         }
 
@@ -336,7 +335,7 @@ public static partial class NetworkUtils
     /// <returns>The broadcast address.</returns>
     public static IPAddress GetBroadcastAddress(IPNetwork network)
     {
-        var addressBytes = network.BaseAddress.GetAddressBytes();
+        var addressBytes = network.Prefix.GetAddressBytes();
         uint ipAddress = BitConverter.ToUInt32(addressBytes, 0);
         uint ipMaskV4 = BitConverter.ToUInt32(CidrToMask(network.PrefixLength, AddressFamily.InterNetwork).GetAddressBytes(), 0);
         uint broadCastIPAddress = ipAddress | ~ipMaskV4;
diff --git a/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs b/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
index f12ef7e634..0d1d27ae8b 100644
--- a/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
@@ -121,7 +121,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
             "yadif_videotoolbox"
         };
 
-        private static readonly IReadOnlyDictionary<int, string[]> _filterOptionsDict = new Dictionary<int, string[]>
+        private static readonly Dictionary<int, string[]> _filterOptionsDict = new Dictionary<int, string[]>
         {
             { 0, new string[] { "scale_cuda", "Output format (default \"same\")" } },
             { 1, new string[] { "tonemap_cuda", "GPU accelerated HDR to SDR tonemapping" } },
@@ -132,7 +132,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
         };
 
         // These are the library versions that corresponds to our minimum ffmpeg version 4.x according to the version table below
-        private static readonly IReadOnlyDictionary<string, Version> _ffmpegMinimumLibraryVersions = new Dictionary<string, Version>
+        private static readonly Dictionary<string, Version> _ffmpegMinimumLibraryVersions = new Dictionary<string, Version>
         {
             { "libavutil", new Version(56, 14) },
             { "libavcodec", new Version(58, 18) },
@@ -197,7 +197,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
         internal bool ValidateVersionInternal(string versionOutput)
         {
-            if (versionOutput.IndexOf("Libav developers", StringComparison.OrdinalIgnoreCase) != -1)
+            if (versionOutput.Contains("Libav developers", StringComparison.OrdinalIgnoreCase))
             {
                 _logger.LogError("FFmpeg validation: avconv instead of ffmpeg is not supported");
                 return false;
@@ -333,7 +333,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
         /// </summary>
         /// <param name="output">The 'ffmpeg -version' output.</param>
         /// <returns>The library names and major.minor version numbers.</returns>
-        private static IReadOnlyDictionary<string, Version> GetFFmpegLibraryVersions(string output)
+        private static Dictionary<string, Version> GetFFmpegLibraryVersions(string output)
         {
             var map = new Dictionary<string, Version>();
 
@@ -537,9 +537,9 @@ namespace MediaBrowser.MediaEncoding.Encoder
             return found;
         }
 
-        private IDictionary<int, bool> GetFFmpegFiltersWithOption()
+        private Dictionary<int, bool> GetFFmpegFiltersWithOption()
         {
-            IDictionary<int, bool> dict = new Dictionary<int, bool>();
+            Dictionary<int, bool> dict = new Dictionary<int, bool>();
             for (int i = 0; i < _filterOptionsDict.Count; i++)
             {
                 if (_filterOptionsDict.TryGetValue(i, out var val) && val.Length == 2)
diff --git a/MediaBrowser.MediaEncoding/Encoder/EncodingUtils.cs b/MediaBrowser.MediaEncoding/Encoder/EncodingUtils.cs
index 04128c9119..c5f500e76f 100644
--- a/MediaBrowser.MediaEncoding/Encoder/EncodingUtils.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/EncodingUtils.cs
@@ -59,7 +59,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
         /// <returns>System.String.</returns>
         private static string GetFileInputArgument(string path, string inputPrefix)
         {
-            if (path.IndexOf("://", StringComparison.Ordinal) != -1)
+            if (path.Contains("://", StringComparison.Ordinal))
             {
                 return string.Format(CultureInfo.InvariantCulture, "\"{0}\"", path);
             }
diff --git a/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs b/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
index 020e69eced..629c300603 100644
--- a/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
+++ b/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
@@ -612,11 +612,11 @@ namespace MediaBrowser.MediaEncoding.Probing
             {
                 codec = "dvbsub";
             }
-            else if ((codec ?? string.Empty).IndexOf("PGS", StringComparison.OrdinalIgnoreCase) != -1)
+            else if ((codec ?? string.Empty).Contains("PGS", StringComparison.OrdinalIgnoreCase))
             {
                 codec = "PGSSUB";
             }
-            else if ((codec ?? string.Empty).IndexOf("DVD", StringComparison.OrdinalIgnoreCase) != -1)
+            else if ((codec ?? string.Empty).Contains("DVD", StringComparison.OrdinalIgnoreCase))
             {
                 codec = "DVDSUB";
             }
@@ -1339,7 +1339,7 @@ namespace MediaBrowser.MediaEncoding.Probing
         {
             // Only use the comma as a delimiter if there are no slashes or pipes.
             // We want to be careful not to split names that have commas in them
-            var delimiter = !allowCommaDelimiter || _nameDelimiters.Any(i => val.IndexOf(i, StringComparison.Ordinal) != -1) ?
+            var delimiter = !allowCommaDelimiter || _nameDelimiters.Any(i => val.Contains(i, StringComparison.Ordinal)) ?
                 _nameDelimiters :
                 new[] { ',' };
 
diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
index 0d4489517e..fd55db4ba4 100644
--- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
+++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEditParser.cs
@@ -88,7 +88,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
         public bool SupportsFileExtension(string fileExtension)
             => _subtitleFormats.ContainsKey(fileExtension);
 
-        private IEnumerable<SubtitleFormat> GetSubtitleFormats()
+        private List<SubtitleFormat> GetSubtitleFormats()
         {
             var subtitleFormats = new List<SubtitleFormat>();
             var assembly = typeof(SubtitleFormat).Assembly;
diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
index 8eea773d86..459d854bf1 100644
--- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
@@ -63,7 +63,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
 
         private string SubtitleCachePath => Path.Combine(_appPaths.DataPath, "subtitles");
 
-        private Stream ConvertSubtitles(
+        private MemoryStream ConvertSubtitles(
             Stream stream,
             string inputFormat,
             string outputFormat,
diff --git a/MediaBrowser.Model/MediaBrowser.Model.csproj b/MediaBrowser.Model/MediaBrowser.Model.csproj
index 1ca5e4327c..89ec156a9f 100644
--- a/MediaBrowser.Model/MediaBrowser.Model.csproj
+++ b/MediaBrowser.Model/MediaBrowser.Model.csproj
@@ -33,6 +33,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.HttpOverrides" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" PrivateAssets="All" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="MimeTypes">
diff --git a/MediaBrowser.Model/Net/IPData.cs b/MediaBrowser.Model/Net/IPData.cs
index e016ffea10..c116d883ed 100644
--- a/MediaBrowser.Model/Net/IPData.cs
+++ b/MediaBrowser.Model/Net/IPData.cs
@@ -1,5 +1,6 @@
 using System.Net;
 using System.Net.Sockets;
+using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
 
 namespace MediaBrowser.Model.Net;
 
@@ -65,9 +66,9 @@ public class IPData
         {
             if (Address.Equals(IPAddress.None))
             {
-                return Subnet.BaseAddress.AddressFamily.Equals(IPAddress.None)
+                return Subnet.Prefix.AddressFamily.Equals(IPAddress.None)
                     ? AddressFamily.Unspecified
-                    : Subnet.BaseAddress.AddressFamily;
+                    : Subnet.Prefix.AddressFamily;
             }
             else
             {
diff --git a/tests/Jellyfin.Server.Tests/ParseNetworkTests.cs b/tests/Jellyfin.Server.Tests/ParseNetworkTests.cs
index 44d9ce13c0..123266d298 100644
--- a/tests/Jellyfin.Server.Tests/ParseNetworkTests.cs
+++ b/tests/Jellyfin.Server.Tests/ParseNetworkTests.cs
@@ -11,6 +11,7 @@ using Microsoft.Extensions.Logging.Abstractions;
 using Moq;
 using Xunit;
 using IConfigurationManager = MediaBrowser.Common.Configuration.IConfigurationManager;
+using IPNetwork = Microsoft.AspNetCore.HttpOverrides.IPNetwork;
 
 namespace Jellyfin.Server.Tests
 {
@@ -99,7 +100,7 @@ namespace Jellyfin.Server.Tests
             Assert.Equal(knownNetworks.Length, options.KnownNetworks.Count);
             foreach (var item in knownNetworks)
             {
-                Assert.NotNull(options.KnownNetworks.FirstOrDefault(x => x.Prefix.Equals(item.BaseAddress) && x.PrefixLength == item.PrefixLength));
+                Assert.NotNull(options.KnownNetworks.FirstOrDefault(x => x.Prefix.Equals(item.Prefix) && x.PrefixLength == item.PrefixLength));
             }
         }