diff --git a/Emby.Server.Implementations/ApplicationHost.cs b/Emby.Server.Implementations/ApplicationHost.cs
index 484942946..e15cb68e9 100644
--- a/Emby.Server.Implementations/ApplicationHost.cs
+++ b/Emby.Server.Implementations/ApplicationHost.cs
@@ -200,7 +200,7 @@ namespace Emby.Server.Implementations
         /// <summary>
         /// The disposable parts
         /// </summary>
-        protected readonly List<IDisposable> _disposableParts = new List<IDisposable>();
+        private readonly List<IDisposable> _disposableParts = new List<IDisposable>();
 
         /// <summary>
         /// Gets the configuration manager.
@@ -216,8 +216,9 @@ namespace Emby.Server.Implementations
             {
 #if BETA
                 return PackageVersionClass.Beta;
-#endif
+#else
                 return PackageVersionClass.Release;
+#endif
             }
         }
 
@@ -340,7 +341,6 @@ namespace Emby.Server.Implementations
 
         protected IProcessFactory ProcessFactory { get; private set; }
 
-        protected ICryptoProvider CryptographyProvider = new CryptographyProvider();
         protected readonly IXmlSerializer XmlSerializer;
 
         protected ISocketFactory SocketFactory { get; private set; }
@@ -369,9 +369,6 @@ namespace Emby.Server.Implementations
         {
             _configuration = configuration;
 
-            // hack alert, until common can target .net core
-            BaseExtensions.CryptographyProvider = CryptographyProvider;
-
             XmlSerializer = new MyXmlSerializer(fileSystem, loggerFactory);
 
             NetworkManager = networkManager;
@@ -735,13 +732,12 @@ namespace Emby.Server.Implementations
             ApplicationHost.StreamHelper = new StreamHelper();
             serviceCollection.AddSingleton(StreamHelper);
 
-            serviceCollection.AddSingleton(CryptographyProvider);
+            serviceCollection.AddSingleton(typeof(ICryptoProvider), typeof(CryptographyProvider));
 
             SocketFactory = new SocketFactory();
             serviceCollection.AddSingleton(SocketFactory);
 
-            InstallationManager = new InstallationManager(LoggerFactory, this, ApplicationPaths, HttpClient, JsonSerializer, ServerConfigurationManager, FileSystemManager, CryptographyProvider, ZipClient, PackageRuntime);
-            serviceCollection.AddSingleton(InstallationManager);
+            serviceCollection.AddSingleton(typeof(IInstallationManager), typeof(InstallationManager));
 
             ZipClient = new ZipClient();
             serviceCollection.AddSingleton(ZipClient);
@@ -908,8 +904,6 @@ namespace Emby.Server.Implementations
             _serviceProvider = serviceCollection.BuildServiceProvider();
         }
 
-        public virtual string PackageRuntime => "netcore";
-
         public static void LogEnvironmentInfo(ILogger logger, IApplicationPaths appPaths)
         {
             // Distinct these to prevent users from reporting problems that aren't actually problems
@@ -1049,6 +1043,8 @@ namespace Emby.Server.Implementations
         /// </summary>
         protected void FindParts()
         {
+            InstallationManager = _serviceProvider.GetService<IInstallationManager>();
+
             if (!ServerConfigurationManager.Configuration.IsPortAuthorized)
             {
                 ServerConfigurationManager.Configuration.IsPortAuthorized = true;
diff --git a/Emby.Server.Implementations/Cryptography/CryptographyProvider.cs b/Emby.Server.Implementations/Cryptography/CryptographyProvider.cs
index 982bba625..6d7193ce2 100644
--- a/Emby.Server.Implementations/Cryptography/CryptographyProvider.cs
+++ b/Emby.Server.Implementations/Cryptography/CryptographyProvider.cs
@@ -4,7 +4,6 @@ using System.Globalization;
 using System.IO;
 using System.Security.Cryptography;
 using System.Text;
-using System.Linq;
 using MediaBrowser.Model.Cryptography;
 
 namespace Emby.Server.Implementations.Cryptography
@@ -136,7 +135,7 @@ namespace Emby.Server.Implementations.Cryptography
         {
             return PBKDF2(DefaultHashMethod, bytes, salt, _defaultIterations);
         }
-        
+
         public byte[] ComputeHash(PasswordHash hash)
         {
             int iterations = _defaultIterations;
diff --git a/Emby.Server.Implementations/Data/SqliteDisplayPreferencesRepository.cs b/Emby.Server.Implementations/Data/SqliteDisplayPreferencesRepository.cs
index 3d60925da..47552806d 100644
--- a/Emby.Server.Implementations/Data/SqliteDisplayPreferencesRepository.cs
+++ b/Emby.Server.Implementations/Data/SqliteDisplayPreferencesRepository.cs
@@ -90,9 +90,10 @@ namespace Emby.Server.Implementations.Data
             {
                 throw new ArgumentNullException(nameof(displayPreferences));
             }
+
             if (string.IsNullOrEmpty(displayPreferences.Id))
             {
-                throw new ArgumentNullException(nameof(displayPreferences.Id));
+                throw new ArgumentException("Display preferences has an invalid Id", nameof(displayPreferences));
             }
 
             cancellationToken.ThrowIfCancellationRequested();
diff --git a/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs b/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
index 038965647..8369f4f59 100644
--- a/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
+++ b/Emby.Server.Implementations/EntryPoints/LibraryChangedNotifier.cs
@@ -388,7 +388,7 @@ namespace Emby.Server.Implementations.EntryPoints
 
                 FoldersRemovedFrom = foldersRemovedFrom.SelectMany(i => TranslatePhysicalItemToUserLibrary(i, user)).Select(i => i.Id.ToString("N")).Distinct().ToArray(),
 
-                CollectionFolders = GetTopParentIds(newAndRemoved, user, allUserRootChildren).ToArray()
+                CollectionFolders = GetTopParentIds(newAndRemoved, allUserRootChildren).ToArray()
             };
         }
 
@@ -407,7 +407,7 @@ namespace Emby.Server.Implementations.EntryPoints
             return item.SourceType == SourceType.Library;
         }
 
-        private IEnumerable<string> GetTopParentIds(List<BaseItem> items, User user, List<Folder> allUserRootChildren)
+        private IEnumerable<string> GetTopParentIds(List<BaseItem> items, List<Folder> allUserRootChildren)
         {
             var list = new List<string>();
 
diff --git a/Emby.Server.Implementations/HttpServer/Security/AuthService.cs b/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
index 499a334fc..1027883ed 100644
--- a/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
+++ b/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
@@ -45,7 +45,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
             // This code is executed before the service
             var auth = AuthorizationContext.GetAuthorizationInfo(request);
 
-            if (!IsExemptFromAuthenticationToken(auth, authAttribtues, request))
+            if (!IsExemptFromAuthenticationToken(authAttribtues, request))
             {
                 ValidateSecurityToken(request, auth.Token);
             }
@@ -122,7 +122,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
             }
         }
 
-        private bool IsExemptFromAuthenticationToken(AuthorizationInfo auth, IAuthenticationAttributes authAttribtues, IRequest request)
+        private bool IsExemptFromAuthenticationToken(IAuthenticationAttributes authAttribtues, IRequest request)
         {
             if (!_config.Configuration.IsStartupWizardCompleted && authAttribtues.AllowBeforeStartupWizard)
             {
diff --git a/Emby.Server.Implementations/HttpServer/StreamWriter.cs b/Emby.Server.Implementations/HttpServer/StreamWriter.cs
index cf30bbc32..324f9085e 100644
--- a/Emby.Server.Implementations/HttpServer/StreamWriter.cs
+++ b/Emby.Server.Implementations/HttpServer/StreamWriter.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
@@ -14,8 +13,6 @@ namespace Emby.Server.Implementations.HttpServer
     /// </summary>
     public class StreamWriter : IAsyncStreamWriter, IHasHeaders
     {
-        private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
-
         /// <summary>
         /// Gets or sets the source stream.
         /// </summary>
diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
index 58b3b6a69..7b210d231 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
@@ -261,7 +261,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
         public string HomePageUrl => "https://github.com/jellyfin/jellyfin";
 
-        public async Task RefreshSeriesTimers(CancellationToken cancellationToken, IProgress<double> progress)
+        public async Task RefreshSeriesTimers(CancellationToken cancellationToken)
         {
             var seriesTimers = await GetSeriesTimersAsync(cancellationToken).ConfigureAwait(false);
 
@@ -271,7 +271,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             }
         }
 
-        public async Task RefreshTimers(CancellationToken cancellationToken, IProgress<double> progress)
+        public async Task RefreshTimers(CancellationToken cancellationToken)
         {
             var timers = await GetTimersAsync(cancellationToken).ConfigureAwait(false);
 
diff --git a/Emby.Server.Implementations/LiveTv/LiveTvManager.cs b/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
index f7ef16fb0..9093d9740 100644
--- a/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
+++ b/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
@@ -1087,8 +1087,8 @@ namespace Emby.Server.Implementations.LiveTv
 
             if (coreService != null)
             {
-                await coreService.RefreshSeriesTimers(cancellationToken, new SimpleProgress<double>()).ConfigureAwait(false);
-                await coreService.RefreshTimers(cancellationToken, new SimpleProgress<double>()).ConfigureAwait(false);
+                await coreService.RefreshSeriesTimers(cancellationToken).ConfigureAwait(false);
+                await coreService.RefreshTimers(cancellationToken).ConfigureAwait(false);
             }
 
             // Load these now which will prefetch metadata
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
index 588dcb843..2d9bec53f 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
@@ -10,14 +10,12 @@ using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
-using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.LiveTv;
 using MediaBrowser.Model.MediaInfo;
 using MediaBrowser.Model.Serialization;
-using MediaBrowser.Model.System;
 using Microsoft.Extensions.Logging;
 using Microsoft.Net.Http.Headers;
 
@@ -52,9 +50,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
         {
             var channelIdPrefix = GetFullChannelIdPrefix(info);
 
-            var result = await new M3uParser(Logger, _httpClient, _appHost).Parse(info.Url, channelIdPrefix, info.Id, cancellationToken).ConfigureAwait(false);
-
-            return result.Cast<ChannelInfo>().ToList();
+            return await new M3uParser(Logger, _httpClient, _appHost).Parse(info.Url, channelIdPrefix, info.Id, cancellationToken).ConfigureAwait(false);
         }
 
         public Task<List<LiveTvTunerInfo>> GetTunerInfos(CancellationToken cancellationToken)
@@ -73,7 +69,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             return Task.FromResult(list);
         }
 
-        private string[] _disallowedSharedStreamExtensions = new string[]
+        private static readonly string[] _disallowedSharedStreamExtensions = new string[]
         {
             ".mkv",
             ".mp4",
@@ -88,9 +84,9 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             if (tunerCount > 0)
             {
                 var tunerHostId = info.Id;
-                var liveStreams = currentLiveStreams.Where(i => string.Equals(i.TunerHostId, tunerHostId, StringComparison.OrdinalIgnoreCase)).ToList();
+                var liveStreams = currentLiveStreams.Where(i => string.Equals(i.TunerHostId, tunerHostId, StringComparison.OrdinalIgnoreCase));
 
-                if (liveStreams.Count >= tunerCount)
+                if (liveStreams.Count() >= tunerCount)
                 {
                     throw new LiveTvConflictException("M3U simultaneous stream limit has been reached.");
                 }
@@ -98,7 +94,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
             var sources = await GetChannelStreamMediaSources(info, channelInfo, cancellationToken).ConfigureAwait(false);
 
-            var mediaSource = sources.First();
+            var mediaSource = sources[0];
 
             if (mediaSource.Protocol == MediaProtocol.Http && !mediaSource.RequiresLooping)
             {
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
index ad124bb0f..814031b12 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
@@ -11,7 +11,6 @@ using MediaBrowser.Common.Net;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.LiveTv;
 using MediaBrowser.Model.Extensions;
-using MediaBrowser.Model.IO;
 using Microsoft.Extensions.Logging;
 
 namespace Emby.Server.Implementations.LiveTv.TunerHosts
@@ -62,12 +61,13 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             return Task.FromResult((Stream)File.OpenRead(url));
         }
 
-        const string ExtInfPrefix = "#EXTINF:";
+        private const string ExtInfPrefix = "#EXTINF:";
+
         private List<ChannelInfo> GetChannels(TextReader reader, string channelIdPrefix, string tunerHostId)
         {
             var channels = new List<ChannelInfo>();
             string line;
-            string extInf = "";
+            string extInf = string.Empty;
 
             while ((line = reader.ReadLine()) != null)
             {
@@ -101,7 +101,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
                     channel.Path = line;
                     channels.Add(channel);
-                    extInf = "";
+                    extInf = string.Empty;
                 }
             }
 
@@ -110,8 +110,10 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         private ChannelInfo GetChannelnfo(string extInf, string tunerHostId, string mediaUrl)
         {
-            var channel = new ChannelInfo();
-            channel.TunerHostId = tunerHostId;
+            var channel = new ChannelInfo()
+            {
+                TunerHostId = tunerHostId
+            };
 
             extInf = extInf.Trim();
 
@@ -137,13 +139,15 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             {
                 channelIdValues.Add(channelId);
             }
+
             if (!string.IsNullOrWhiteSpace(tvgId))
             {
                 channelIdValues.Add(tvgId);
             }
+
             if (channelIdValues.Count > 0)
             {
-                channel.Id = string.Join("_", channelIdValues.ToArray());
+                channel.Id = string.Join("_", channelIdValues);
             }
 
             return channel;
@@ -152,7 +156,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
         private string GetChannelNumber(string extInf, Dictionary<string, string> attributes, string mediaUrl)
         {
             var nameParts = extInf.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
-            var nameInExtInf = nameParts.Length > 1 ? nameParts.Last().Trim() : null;
+            var nameInExtInf = nameParts.Length > 1 ? nameParts[nameParts.Length - 1].Trim() : null;
 
             string numberString = null;
             string attributeValue;
diff --git a/Emby.Server.Implementations/Updates/InstallationManager.cs b/Emby.Server.Implementations/Updates/InstallationManager.cs
index 301802b8a..7310de55d 100644
--- a/Emby.Server.Implementations/Updates/InstallationManager.cs
+++ b/Emby.Server.Implementations/Updates/InstallationManager.cs
@@ -12,7 +12,6 @@ using MediaBrowser.Common.Plugins;
 using MediaBrowser.Common.Progress;
 using MediaBrowser.Common.Updates;
 using MediaBrowser.Controller.Configuration;
-using MediaBrowser.Model.Cryptography;
 using MediaBrowser.Model.Events;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Serialization;
@@ -39,11 +38,10 @@ namespace Emby.Server.Implementations.Updates
         /// <summary>
         /// The completed installations
         /// </summary>
-        private ConcurrentBag<InstallationInfo> CompletedInstallationsInternal { get; set; }
+        private ConcurrentBag<InstallationInfo> _completedInstallationsInternal;
 
-        public IEnumerable<InstallationInfo> CompletedInstallations => CompletedInstallationsInternal;
+        public IEnumerable<InstallationInfo> CompletedInstallations => _completedInstallationsInternal;
 
-        #region PluginUninstalled Event
         /// <summary>
         /// Occurs when [plugin uninstalled].
         /// </summary>
@@ -57,9 +55,7 @@ namespace Emby.Server.Implementations.Updates
         {
             PluginUninstalled?.Invoke(this, new GenericEventArgs<IPlugin> { Argument = plugin });
         }
-        #endregion
 
-        #region PluginUpdated Event
         /// <summary>
         /// Occurs when [plugin updated].
         /// </summary>
@@ -77,9 +73,7 @@ namespace Emby.Server.Implementations.Updates
 
             _applicationHost.NotifyPendingRestart();
         }
-        #endregion
 
-        #region PluginInstalled Event
         /// <summary>
         /// Occurs when [plugin updated].
         /// </summary>
@@ -96,7 +90,6 @@ namespace Emby.Server.Implementations.Updates
 
             _applicationHost.NotifyPendingRestart();
         }
-        #endregion
 
         /// <summary>
         /// The _logger
@@ -115,12 +108,8 @@ namespace Emby.Server.Implementations.Updates
         /// <value>The application host.</value>
         private readonly IApplicationHost _applicationHost;
 
-        private readonly ICryptoProvider _cryptographyProvider;
         private readonly IZipClient _zipClient;
 
-        // netframework or netcore
-        private readonly string _packageRuntime;
-
         public InstallationManager(
             ILoggerFactory loggerFactory,
             IApplicationHost appHost,
@@ -129,9 +118,7 @@ namespace Emby.Server.Implementations.Updates
             IJsonSerializer jsonSerializer,
             IServerConfigurationManager config,
             IFileSystem fileSystem,
-            ICryptoProvider cryptographyProvider,
-            IZipClient zipClient,
-            string packageRuntime)
+            IZipClient zipClient)
         {
             if (loggerFactory == null)
             {
@@ -139,18 +126,16 @@ namespace Emby.Server.Implementations.Updates
             }
 
             CurrentInstallations = new List<Tuple<InstallationInfo, CancellationTokenSource>>();
-            CompletedInstallationsInternal = new ConcurrentBag<InstallationInfo>();
+            _completedInstallationsInternal = new ConcurrentBag<InstallationInfo>();
 
+            _logger = loggerFactory.CreateLogger(nameof(InstallationManager));
             _applicationHost = appHost;
             _appPaths = appPaths;
             _httpClient = httpClient;
             _jsonSerializer = jsonSerializer;
             _config = config;
             _fileSystem = fileSystem;
-            _cryptographyProvider = cryptographyProvider;
             _zipClient = zipClient;
-            _packageRuntime = packageRuntime;
-            _logger = loggerFactory.CreateLogger(nameof(InstallationManager));
         }
 
         private static Version GetPackageVersion(PackageVersionInfo version)
@@ -222,11 +207,6 @@ namespace Emby.Server.Implementations.Updates
                         continue;
                     }
 
-                    if (string.IsNullOrEmpty(version.runtimes) || version.runtimes.IndexOf(_packageRuntime, StringComparison.OrdinalIgnoreCase) == -1)
-                    {
-                        continue;
-                    }
-
                     versions.Add(version);
                 }
 
@@ -448,7 +428,7 @@ namespace Emby.Server.Implementations.Updates
                     CurrentInstallations.Remove(tuple);
                 }
 
-                CompletedInstallationsInternal.Add(installationInfo);
+                _completedInstallationsInternal.Add(installationInfo);
 
                 PackageInstallationCompleted?.Invoke(this, installationEventArgs);
             }
diff --git a/Jellyfin.Server/Program.cs b/Jellyfin.Server/Program.cs
index 82a76c637..d4b10c8c8 100644
--- a/Jellyfin.Server/Program.cs
+++ b/Jellyfin.Server/Program.cs
@@ -19,7 +19,6 @@ using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.IO;
-using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
diff --git a/MediaBrowser.Common/Extensions/BaseExtensions.cs b/MediaBrowser.Common/Extensions/BaseExtensions.cs
index db0514bb1..40c16b957 100644
--- a/MediaBrowser.Common/Extensions/BaseExtensions.cs
+++ b/MediaBrowser.Common/Extensions/BaseExtensions.cs
@@ -1,6 +1,7 @@
 using System;
+using System.Text;
 using System.Text.RegularExpressions;
-using MediaBrowser.Model.Cryptography;
+using System.Security.Cryptography;
 
 namespace MediaBrowser.Common.Extensions
 {
@@ -9,8 +10,6 @@ namespace MediaBrowser.Common.Extensions
     /// </summary>
     public static class BaseExtensions
     {
-        public static ICryptoProvider CryptographyProvider { get; set; }
-
         /// <summary>
         /// Strips the HTML.
         /// </summary>
@@ -31,7 +30,10 @@ namespace MediaBrowser.Common.Extensions
         /// <returns>Guid.</returns>
         public static Guid GetMD5(this string str)
         {
-            return CryptographyProvider.GetMD5(str);
+            using (var provider = MD5.Create())
+            {
+                return new Guid(provider.ComputeHash(Encoding.Unicode.GetBytes(str)));
+            }
         }
     }
 }
diff --git a/jellyfin.ruleset b/jellyfin.ruleset
index 0a04b4c55..262121a32 100644
--- a/jellyfin.ruleset
+++ b/jellyfin.ruleset
@@ -20,6 +20,9 @@
     <Rule Id="SA1633" Action="None" />
   </Rules>
   <Rules AnalyzerId="Microsoft.CodeAnalysis.FxCopAnalyzers" RuleNamespace="Microsoft.Design">
+    <!-- disable warning CA1822: Member does not access instance data and can be marked as static -->
+    <Rule Id="CA1822" Action="Info" />
+
     <!-- disable warning CA1054: Change the type of parameter url from string to System.Uri -->
     <Rule Id="CA1054" Action="None" />
   </Rules>