diff --git a/src/DateTimeRoutines/DateTimeRoutines.csproj b/src/DateTimeRoutines/DateTimeRoutines.csproj
index b67128d3c..19c517c26 100644
--- a/src/DateTimeRoutines/DateTimeRoutines.csproj
+++ b/src/DateTimeRoutines/DateTimeRoutines.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <LangVersion>8</LangVersion>
+    <LangVersion>9</LangVersion>
     <NoWarn />
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <WarningsAsErrors />
diff --git a/src/Jackett.Common/Indexers/Definitions/Abstract/AvistazTracker.cs b/src/Jackett.Common/Indexers/Definitions/Abstract/AvistazTracker.cs
index cc3cad01f..d7fa9484b 100644
--- a/src/Jackett.Common/Indexers/Definitions/Abstract/AvistazTracker.cs
+++ b/src/Jackett.Common/Indexers/Definitions/Abstract/AvistazTracker.cs
@@ -225,13 +225,13 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
 
                     var description = "";
                     var jAudio = row.Value<JArray>("audio");
-                    if (jAudio != null && jAudio.HasValues)
+                    if (jAudio is { HasValues: true })
                     {
                         var audioList = jAudio.Select(tag => tag.Value<string>("language")).ToList();
                         description += $"Audio: {string.Join(", ", audioList)}";
                     }
                     var jSubtitle = row.Value<JArray>("subtitle");
-                    if (jSubtitle != null && jSubtitle.HasValues)
+                    if (jSubtitle is { HasValues: true })
                     {
                         var subtitleList = jSubtitle.Select(tag => tag.Value<string>("language")).ToList();
                         description += $"<br/>Subtitles: {string.Join(", ", subtitleList)}";
@@ -260,7 +260,7 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
                         Subs = row.Value<JArray>("subtitle")?.Select(x => x.Value<string>("language")).ToList() ?? new List<string>(),
                     };
 
-                    if (release.Size.HasValue && release.Size > 0)
+                    if (release.Size is > 0)
                     {
                         var sizeGigabytes = release.Size.Value / Math.Pow(1024, 3);
 
@@ -270,7 +270,7 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
                     }
 
                     var jMovieTv = row.Value<JToken>("movie_tv");
-                    if (jMovieTv != null && jMovieTv.HasValues)
+                    if (jMovieTv is { HasValues: true })
                     {
                         release.Imdb = ParseUtil.GetImdbId(jMovieTv.Value<string>("imdb"));
 
diff --git a/src/Jackett.Common/Indexers/Definitions/Abstract/GazelleTracker.cs b/src/Jackett.Common/Indexers/Definitions/Abstract/GazelleTracker.cs
index 7dd9eeb8e..6a44e17ff 100644
--- a/src/Jackett.Common/Indexers/Definitions/Abstract/GazelleTracker.cs
+++ b/src/Jackett.Common/Indexers/Definitions/Abstract/GazelleTracker.cs
@@ -234,11 +234,11 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
                 queryCollection.Set("filter_cat[" + cat + "]", "1");
             }
 
-            if (configData.FreeleechOnly != null && configData.FreeleechOnly.Value)
+            if (configData.FreeleechOnly is { Value: true })
             {
                 queryCollection.Set("freetorrent", "1");
             }
-            else if (configData.FreeloadOnly != null && configData.FreeloadOnly.Value)
+            else if (configData.FreeloadOnly is { Value: true })
             {
                 queryCollection.Set("freetorrent", "4");
             }
@@ -397,7 +397,7 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
             var isFreeleech = bool.TryParse((string)torrent["isFreeleech"], out var freeleech) && freeleech;
 
             // skip non-freeleech results when freeleech only is set
-            return configData.FreeleechOnly != null && configData.FreeleechOnly.Value && !isFreeleech;
+            return configData.FreeleechOnly is { Value: true } && !isFreeleech;
         }
 
         protected void FillReleaseInfoFromJson(ReleaseInfo release, JObject torrent)
@@ -522,7 +522,7 @@ namespace Jackett.Common.Indexers.Definitions.Abstract
             }
 
             var isPersonalFreeleech = (bool?)torrent["isPersonalFreeleech"];
-            if (isPersonalFreeleech != null && isPersonalFreeleech == true)
+            if (isPersonalFreeleech is true)
             {
                 release.DownloadVolumeFactor = 0;
             }
diff --git a/src/Jackett.Common/Indexers/Definitions/AnimeBytes.cs b/src/Jackett.Common/Indexers/Definitions/AnimeBytes.cs
index bff3d31d2..4773942ff 100644
--- a/src/Jackett.Common/Indexers/Definitions/AnimeBytes.cs
+++ b/src/Jackett.Common/Indexers/Definitions/AnimeBytes.cs
@@ -33,7 +33,7 @@ namespace Jackett.Common.Indexers.Definitions
 
         private string ScrapeUrl => SiteLink + "scrape.php";
         private bool AllowRaws => ConfigData.IncludeRaw.Value;
-        private bool PadEpisode => ConfigData.PadEpisode != null && ConfigData.PadEpisode.Value;
+        private bool PadEpisode => ConfigData.PadEpisode is { Value: true };
         private bool AddJapaneseTitle => ConfigData.AddJapaneseTitle.Value;
         private bool AddRomajiTitle => ConfigData.AddRomajiTitle.Value;
         private bool AddAlternativeTitles => ConfigData.AddAlternativeTitles.Value;
@@ -455,7 +455,7 @@ namespace Jackett.Common.Indexers.Definitions
 
                         if (FilterSeasonEpisode)
                         {
-                            if (query.Season.HasValue && query.Season > 0 && season != null && season != query.Season) // skip if season doesn't match
+                            if (query.Season is > 0 && season != null && season != query.Season) // skip if season doesn't match
                             {
                                 continue;
                             }
diff --git a/src/Jackett.Common/Indexers/Definitions/CardigannIndexer.cs b/src/Jackett.Common/Indexers/Definitions/CardigannIndexer.cs
index 33e82d21d..1bfb12b10 100644
--- a/src/Jackett.Common/Indexers/Definitions/CardigannIndexer.cs
+++ b/src/Jackett.Common/Indexers/Definitions/CardigannIndexer.cs
@@ -98,7 +98,7 @@ namespace Jackett.Common.Indexers.Definitions
             if (Definition.RequestDelay != null)
                 webclient.requestDelay = Definition.RequestDelay.Value;
 
-            if (Definition.Login != null && Definition.Login.Method == null)
+            if (Definition.Login is { Method: null })
                 Definition.Login.Method = "form";
 
             if (Definition.Search.Paths == null)
@@ -146,7 +146,7 @@ namespace Jackett.Common.Indexers.Definitions
                         case "checkbox":
                             item = new BoolConfigurationItem(itemName) { Value = false };
 
-                            if (Setting.Default != null && Setting.Default == "true")
+                            if (Setting.Default is "true")
                             {
                                 ((BoolConfigurationItem)item).Value = true;
                             }
@@ -1557,7 +1557,7 @@ namespace Jackett.Common.Indexers.Definitions
 
                 var results = response.ContentString;
 
-                if (SearchPath.Response != null && SearchPath.Response.Type.Equals("json"))
+                if (SearchPath.Response is { Type: "json" })
                 {
                     // check if we need to login again
                     var loginNeeded = CheckIfLoginIsNeeded(response);
@@ -1591,8 +1591,7 @@ namespace Jackett.Common.Indexers.Definitions
                     }
 
                     if (response.Status == HttpStatusCode.OK
-                        && SearchPath.Response != null
-                        && SearchPath.Response.NoResultsMessage != null
+                        && SearchPath.Response is { NoResultsMessage: not null }
                         && (SearchPath.Response.NoResultsMessage != string.Empty && results.Contains(SearchPath.Response.NoResultsMessage) || (SearchPath.Response.NoResultsMessage == string.Empty && results == string.Empty)))
                     {
                         continue;
@@ -1733,7 +1732,7 @@ namespace Jackett.Common.Indexers.Definitions
                     {
                         IHtmlCollection<IElement> rowsDom;
 
-                        if (SearchPath.Response != null && SearchPath.Response.Type.Equals("xml"))
+                        if (SearchPath.Response is { Type: "xml" })
                         {
                             var SearchResultParser = new XmlParser();
                             var SearchResultDocument = SearchResultParser.ParseDocument(results);
diff --git a/src/Jackett.Common/Indexers/Definitions/GreatPosterWall.cs b/src/Jackett.Common/Indexers/Definitions/GreatPosterWall.cs
index a39132e48..552f9b6ce 100644
--- a/src/Jackett.Common/Indexers/Definitions/GreatPosterWall.cs
+++ b/src/Jackett.Common/Indexers/Definitions/GreatPosterWall.cs
@@ -145,7 +145,7 @@ namespace Jackett.Common.Indexers.Definitions
             }
 
             var isPersonalFreeleech = (bool?)torrent["isPersonalFreeleech"];
-            if (isPersonalFreeleech != null && isPersonalFreeleech == true)
+            if (isPersonalFreeleech is true)
                 release.DownloadVolumeFactor = 0;
 
             var imdbID = (string)result["imdbId"];
diff --git a/src/Jackett.Common/Indexers/Definitions/LostFilm.cs b/src/Jackett.Common/Indexers/Definitions/LostFilm.cs
index d95e53c0f..2320c2a6c 100644
--- a/src/Jackett.Common/Indexers/Definitions/LostFilm.cs
+++ b/src/Jackett.Common/Indexers/Definitions/LostFilm.cs
@@ -385,7 +385,7 @@ namespace Jackett.Common.Indexers.Definitions
                     foreach (var serie in series)
                     {
                         var link = serie["link"].ToString();
-                        var season = query.Season.HasValue && query.Season > 0 ? $"/season_{query.Season}" : "/seasons";
+                        var season = query.Season is > 0 ? $"/season_{query.Season}" : "/seasons";
                         var url = SiteLink + link.TrimStart('/') + season;
 
                         if (!string.IsNullOrEmpty(query.Episode)) // Fetch single episode releases
diff --git a/src/Jackett.Common/Indexers/Definitions/MejorTorrent.cs b/src/Jackett.Common/Indexers/Definitions/MejorTorrent.cs
index f392c9cac..801d4a50e 100644
--- a/src/Jackett.Common/Indexers/Definitions/MejorTorrent.cs
+++ b/src/Jackett.Common/Indexers/Definitions/MejorTorrent.cs
@@ -222,7 +222,7 @@ namespace Jackett.Common.Indexers.Definitions
                     {
                         // check there are results
                         var rows = table.Children;
-                        if (rows != null && rows.Length > 0)
+                        if (rows is { Length: > 0 })
                             foreach (var row in rows)
                             {
                                 var rowQuality = row.Children[0].Children[0].Children[0].TextContent;
diff --git a/src/Jackett.Common/Indexers/Definitions/Redacted.cs b/src/Jackett.Common/Indexers/Definitions/Redacted.cs
index 04d4082dd..2b59b682f 100644
--- a/src/Jackett.Common/Indexers/Definitions/Redacted.cs
+++ b/src/Jackett.Common/Indexers/Definitions/Redacted.cs
@@ -87,7 +87,7 @@ namespace Jackett.Common.Indexers.Definitions
         {
             var isFreeload = bool.TryParse((string)torrent["isFreeload"], out var freeload) && freeload;
 
-            if (configData.FreeloadOnly != null && configData.FreeloadOnly.Value && !isFreeload)
+            if (configData.FreeloadOnly is { Value: true } && !isFreeload)
             {
                 return true;
             }
diff --git a/src/Jackett.Common/Indexers/Definitions/RuTracker.cs b/src/Jackett.Common/Indexers/Definitions/RuTracker.cs
index b5eaa4c1e..d6b79c267 100644
--- a/src/Jackett.Common/Indexers/Definitions/RuTracker.cs
+++ b/src/Jackett.Common/Indexers/Definitions/RuTracker.cs
@@ -1535,7 +1535,7 @@ namespace Jackett.Common.Indexers.Definitions
             {
                 searchString = searchString.Replace("-", " ");
 
-                if (query.Season.HasValue && query.Season > 0)
+                if (query.Season is > 0)
                 {
                     searchString += " Сезон: " + query.Season;
                 }
diff --git a/src/Jackett.Common/Indexers/Definitions/Shazbat.cs b/src/Jackett.Common/Indexers/Definitions/Shazbat.cs
index 1f8ca3485..bd0e6a9ed 100644
--- a/src/Jackett.Common/Indexers/Definitions/Shazbat.cs
+++ b/src/Jackett.Common/Indexers/Definitions/Shazbat.cs
@@ -64,7 +64,7 @@ namespace Jackett.Common.Indexers.Definitions
             return caps;
         }
 
-        private int ShowPagesFetchLimit => int.TryParse(configData.ShowPagesFetchLimit.Value, out var limit) && limit > 0 && limit <= 5 ? limit : 2;
+        private int ShowPagesFetchLimit => int.TryParse(configData.ShowPagesFetchLimit.Value, out var limit) && limit is > 0 and <= 5 ? limit : 2;
 
         public override async Task<IndexerConfigurationStatus> ApplyConfiguration(JToken configJson)
         {
diff --git a/src/Jackett.Common/Indexers/Definitions/SubsPlease.cs b/src/Jackett.Common/Indexers/Definitions/SubsPlease.cs
index 84000d176..861671abb 100644
--- a/src/Jackett.Common/Indexers/Definitions/SubsPlease.cs
+++ b/src/Jackett.Common/Indexers/Definitions/SubsPlease.cs
@@ -145,7 +145,7 @@ namespace Jackett.Common.Indexers.Definitions
                 }
 
                 // Only include season > 1 in searchTerm, format as S2 rather than S02
-                if (query.Season.HasValue && query.Season.Value > 1)
+                if (query.Season is > 1)
                 {
                     searchTerm += $" S{query.Season}";
                     query.Season = 0;
diff --git a/src/Jackett.Common/Indexers/Definitions/TVStore.cs b/src/Jackett.Common/Indexers/Definitions/TVStore.cs
index 197b10721..afc3f48b2 100644
--- a/src/Jackett.Common/Indexers/Definitions/TVStore.cs
+++ b/src/Jackett.Common/Indexers/Definitions/TVStore.cs
@@ -303,7 +303,7 @@ namespace Jackett.Common.Indexers.Definitions
                 queryParams.Add("c", Convert.ToBase64String(plainTextBytes));
             }
 
-            if (query.Season.HasValue && query.Season > 0)
+            if (query.Season is > 0)
             {
                 queryParams.Add("s", query.Season.ToString());
 
diff --git a/src/Jackett.Common/Indexers/Definitions/Toloka.cs b/src/Jackett.Common/Indexers/Definitions/Toloka.cs
index 7d489b1eb..dfc2a42c8 100644
--- a/src/Jackett.Common/Indexers/Definitions/Toloka.cs
+++ b/src/Jackett.Common/Indexers/Definitions/Toloka.cs
@@ -272,7 +272,7 @@ namespace Jackett.Common.Indexers.Definitions
             {
                 searchString = searchString.Replace("-", " ");
 
-                if (query.Season.HasValue && query.Season > 0)
+                if (query.Season is > 0)
                 {
                     searchString += " Сезон " + query.Season;
                 }
diff --git a/src/Jackett.Common/Jackett.Common.csproj b/src/Jackett.Common/Jackett.Common.csproj
index 438ee365f..14a3b391b 100644
--- a/src/Jackett.Common/Jackett.Common.csproj
+++ b/src/Jackett.Common/Jackett.Common.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <Version>0.0.0</Version>
-    <LangVersion>8</LangVersion>
+    <LangVersion>9</LangVersion>
     <NoWarn />
     <WarningsAsErrors />
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
diff --git a/src/Jackett.Common/Models/TorznabQuery.cs b/src/Jackett.Common/Models/TorznabQuery.cs
index 10c692fb7..863d66b34 100644
--- a/src/Jackett.Common/Models/TorznabQuery.cs
+++ b/src/Jackett.Common/Models/TorznabQuery.cs
@@ -102,7 +102,7 @@ namespace Jackett.Common.Models
             Publisher.IsNotNullOrWhiteSpace() ||
             Year.HasValue;
 
-        public bool HasSpecifiedCategories => (Categories != null && Categories.Length > 0);
+        public bool HasSpecifiedCategories => Categories is { Length: > 0 };
 
         public string SanitizedSearchTerm
         {
@@ -224,7 +224,7 @@ namespace Jackett.Common.Models
             {
                 var queryString = !string.IsNullOrWhiteSpace(queryStringOverride) ? queryStringOverride : GetQueryString();
 
-                if (limit != null && limit > 0)
+                if (limit is > 0)
                 {
                     if (limit > queryString.Length)
                     {
diff --git a/src/Jackett.Common/Utils/Clients/WebClient.cs b/src/Jackett.Common/Utils/Clients/WebClient.cs
index 9af7e4089..c0efb373a 100644
--- a/src/Jackett.Common/Utils/Clients/WebClient.cs
+++ b/src/Jackett.Common/Utils/Clients/WebClient.cs
@@ -192,7 +192,7 @@ namespace Jackett.Common.Utils.Clients
                 var body = "";
                 var bodySize = 0;
                 var isBinary = false;
-                if (result.ContentBytes != null && result.ContentBytes.Length > 0)
+                if (result.ContentBytes is { Length: > 0 })
                 {
                     bodySize = result.ContentBytes.Length;
                     var contentString = result.ContentString.Trim();
diff --git a/src/Jackett.Service/Service.cs b/src/Jackett.Service/Service.cs
index 8d5f8baad..06a79ab45 100644
--- a/src/Jackett.Service/Service.cs
+++ b/src/Jackett.Service/Service.cs
@@ -82,11 +82,11 @@ namespace Jackett.Service
 
         private void StopConsoleApplication()
         {
-            if (consoleProcess != null && !consoleProcess.HasExited)
+            if (consoleProcess is { HasExited: false })
             {
                 consoleProcess.StandardInput.Close();
                 consoleProcess.WaitForExit(2000);
-                if (consoleProcess != null && !consoleProcess.HasExited)
+                if (consoleProcess is { HasExited: false })
                 {
                     consoleProcess.Kill();
                 }