diff --git a/.github/workflows/c#.yml b/.github/workflows/c#.yml
index 86a618aa..8332141f 100644
--- a/.github/workflows/c#.yml
+++ b/.github/workflows/c#.yml
@@ -37,6 +37,7 @@ jobs:
 
       - uses: muno92/resharper_inspectcode@v1
         with:
+          minimumReportSeverity: info
           solutionPath: c#/tbm.sln
           cachesHome: ${{ github.workspace }}/.resharper
 
diff --git a/c#/.editorconfig b/c#/.editorconfig
index fd644e34..0b9fdd7f 100644
--- a/c#/.editorconfig
+++ b/c#/.editorconfig
@@ -118,7 +118,6 @@ dotnet_style_require_accessibility_modifiers = for_non_interface_members:suggest
 # https://youtrack.jetbrains.com/issue/RSRP-463998
 resharper_arrange_constructor_or_destructor_body_highlighting = none
 resharper_arrange_method_or_operator_body_highlighting = none
-resharper_arrange_object_creation_when_type_not_evident_highlighting = suggestion
 resharper_arrange_redundant_parentheses_highlighting = hint
 resharper_arrange_this_qualifier_highlighting = hint
 resharper_arrange_type_member_modifiers_highlighting = hint
@@ -137,12 +136,12 @@ resharper_enforce_lock_statement_braces_highlighting = warning
 resharper_enforce_using_statement_braces_highlighting = warning
 resharper_enforce_while_statement_braces_highlighting = warning
 resharper_loop_can_be_partly_converted_to_query_highlighting = warning
-resharper_redundant_base_qualifier_highlighting = warning
 resharper_remove_redundant_braces_highlighting = warning
 resharper_suggest_var_or_type_built_in_types_highlighting = hint
 resharper_suggest_var_or_type_elsewhere_highlighting = hint
 resharper_suggest_var_or_type_simple_types_highlighting = hint
 resharper_entity_framework_model_validation_unlimited_string_length_highlighting = none
+resharper_move_local_function_after_jump_statement_highlighting = none
 
 ###############################
 # .NET Coding Conventions     #
diff --git a/c#/crawler/src/Db/CrawlerDbContext.cs b/c#/crawler/src/Db/CrawlerDbContext.cs
index b0784bed..05d23311 100644
--- a/c#/crawler/src/Db/CrawlerDbContext.cs
+++ b/c#/crawler/src/Db/CrawlerDbContext.cs
@@ -21,7 +21,6 @@ public CrawlerDbContext() : this(fid: 0) { }
     public DbSet<ReplyPost> Replies => Set<ReplyPost>();
     public DbSet<ReplySignature> ReplySignatures => Set<ReplySignature>();
     public DbSet<ReplyContent> ReplyContents => Set<ReplyContent>();
-    public DbSet<SubReplyPost> SubReplies => Set<SubReplyPost>();
     public DbSet<SubReplyContent> SubReplyContents => Set<SubReplyContent>();
     public DbSet<Forum> Forums => Set<Forum>();
 
@@ -36,6 +35,7 @@ public void TimestampingEntities() =>
             var updatedAtProp = e.Property(ie => ie.UpdatedAt);
             var lastSeenAtProp = e.Entity is IPost ? e.Property(ie => ((IPost)ie).LastSeenAt) : null;
 
+            // ReSharper disable once SwitchStatementMissingSomeEnumCasesNoDefault
             switch (originalEntityState)
             { // mutates Entry.CurrentValue will always update Entry.IsModified
                 // and the value of corresponding field in entity class instance
diff --git a/c#/crawler/src/Db/Post/IPostWithAuthorExpGrade.cs b/c#/crawler/src/Db/Post/IPostWithAuthorExpGrade.cs
index fde07650..15af2a55 100644
--- a/c#/crawler/src/Db/Post/IPostWithAuthorExpGrade.cs
+++ b/c#/crawler/src/Db/Post/IPostWithAuthorExpGrade.cs
@@ -1,3 +1,4 @@
+// ReSharper disable UnusedMemberInSuper.Global
 namespace tbm.Crawler.Db.Post;
 
 public interface IPostWithAuthorExpGrade
diff --git a/c#/crawler/src/ExtensionMethods.cs b/c#/crawler/src/ExtensionMethods.cs
index 4670f7c6..8febe666 100644
--- a/c#/crawler/src/ExtensionMethods.cs
+++ b/c#/crawler/src/ExtensionMethods.cs
@@ -55,7 +55,7 @@ public static IEnumerable<Exception> GetInnerExceptions(this Exception ex)
         } while (inner != null);
     }
 
-    public static void SetIfNotNull<T1, T2>(this IDictionary<T1, T2> dict, T1 key, T2? value)
+    public static void SetIfNotNull<T1, T2>(this IDictionary<T1, T2> dict, T1 key, T2? value) where T2 : class
     {
         if (value != null) dict[key] = value;
     }
diff --git a/c#/crawler/src/SonicPusher.cs b/c#/crawler/src/SonicPusher.cs
index 0b692e60..a8010339 100644
--- a/c#/crawler/src/SonicPusher.cs
+++ b/c#/crawler/src/SonicPusher.cs
@@ -36,7 +36,7 @@ public float PushPost(Fid fid, string type, PostId id, RepeatedField<Content>? c
             .Trim()
 
             // https://github.com/spikensbror-dotnet/nsonic/pull/10
-            .Replace("\\", "\\\\").Replace("\n", "\\n").Replace("\"", "\\\"");
+            .Replace("\\", @"\\").Replace("\n", "\\n").Replace("\"", "\\\"");
         if (contentTexts == "") return GetElapsedMs();
 
         try
@@ -72,16 +72,13 @@ public void PushPostWithCancellationToken<T>(
                 _ = PushPost(fid, postType, postIdSelector(p), postContentSelector(p));
             }
         }
-        catch (OperationCanceledException e)
+        catch (OperationCanceledException e) when (e.CancellationToken == stoppingToken)
         {
-            if (e.CancellationToken == stoppingToken)
-            {
-                string GetBase64EncodedPostContent(T p) =>
-                    Convert.ToBase64String(Helper.WrapPostContent(postContentSelector(p))
-                        ?.ToByteArray() ?? ReadOnlySpan<byte>.Empty);
-                File.AppendAllLines(ResumeSuspendPostContentsPushingWorker.GetFilePath(postType),
-                    posts.Select(p => $"{fid},{postIdSelector(p)},{GetBase64EncodedPostContent(p)}"));
-            }
+            string GetBase64EncodedPostContent(T p) =>
+                Convert.ToBase64String(Helper.WrapPostContent(postContentSelector(p))
+                    ?.ToByteArray() ?? ReadOnlySpan<byte>.Empty);
+            File.AppendAllLines(ResumeSuspendPostContentsPushingWorker.GetFilePath(postType),
+                posts.Select(p => $"{fid},{postIdSelector(p)},{GetBase64EncodedPostContent(p)}"));
             throw;
         }
         finally
diff --git a/c#/crawler/src/Tieba/ClientRequester.cs b/c#/crawler/src/Tieba/ClientRequester.cs
index cd4483a7..57be4e57 100644
--- a/c#/crawler/src/Tieba/ClientRequester.cs
+++ b/c#/crawler/src/Tieba/ClientRequester.cs
@@ -155,6 +155,7 @@ private async Task<HttpResponseMessage> Post(
         var ret = responseTaskFactory(http);
         _ = ret.ContinueWith(task =>
         {
+            // ReSharper disable once MergeIntoPattern
             if (task.IsCompletedSuccessfully && task.Result.IsSuccessStatusCode) requesterTcs.Increase();
             else requesterTcs.Decrease();
         }, stoppingToken, TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Default);
diff --git a/c#/crawler/src/Tieba/Crawl/Crawler/ReplyCrawler.cs b/c#/crawler/src/Tieba/Crawl/Crawler/ReplyCrawler.cs
index c3b0b93c..92fd7f6c 100644
--- a/c#/crawler/src/Tieba/Crawl/Crawler/ReplyCrawler.cs
+++ b/c#/crawler/src/Tieba/Crawl/Crawler/ReplyCrawler.cs
@@ -19,13 +19,12 @@ public override IList<Reply> GetValidPosts(ReplyResponse response, CrawlRequestF
         var ret = EnsureNonEmptyPostList(response,
             "Reply list is empty, posts might already deleted from tieba.");
         var fidInResponse = response.Data.Forum.Id;
-        if (fidInResponse != fid)
-        { // fid will be the protoBuf default value 0 when reply list is empty, so we EnsureNonEmptyPostList() by first
-            var message = $"Parent forum id within thread response: {fidInResponse} is not match with the param value of"
-                          + $" crawler ctor: {fid}, this thread might be multi forum or \"livepost\" thread.";
-            throw new TiebaException(shouldRetry: false, message);
-        }
-        return ret;
+        if (fidInResponse == fid) return ret;
+
+        // fid will be the protoBuf default value 0 when reply list is empty, so we EnsureNonEmptyPostList() by first
+        var message = $"Parent forum id within thread response: {fidInResponse} is not match with the param value of"
+                      + $" crawler ctor: {fid}, this thread might be multi forum or \"livepost\" thread.";
+        throw new TiebaException(shouldRetry: false, message);
     }
 
     public override TbClient.Page GetResponsePage(ReplyResponse response) => response.Data.Page;
@@ -33,7 +32,7 @@ public override IList<Reply> GetValidPosts(ReplyResponse response, CrawlRequestF
     protected override int GetResponseErrorCode(ReplyResponse response) => response.Error.Errorno;
     protected override IEnumerable<Request> GetRequestsForPage(Page page, CancellationToken stoppingToken = default) =>
     [
-        new Request(Requester.RequestProtoBuf("c/f/pb/page?cmd=302001", "12.26.1.0",
+        new(Requester.RequestProtoBuf("c/f/pb/page?cmd=302001", "12.26.1.0",
             new ReplyRequest {Data = new()
             { // reverse order will be {"last", "1"}, {"r", "1"}
                 Kz = (long)tid,
diff --git a/c#/crawler/src/Tieba/Crawl/Crawler/SubReplyCrawler.cs b/c#/crawler/src/Tieba/Crawl/Crawler/SubReplyCrawler.cs
index 3711e7cf..69f33b4b 100644
--- a/c#/crawler/src/Tieba/Crawl/Crawler/SubReplyCrawler.cs
+++ b/c#/crawler/src/Tieba/Crawl/Crawler/SubReplyCrawler.cs
@@ -33,7 +33,7 @@ public override IList<SubReply> GetValidPosts(SubReplyResponse response, CrawlRe
     protected override int GetResponseErrorCode(SubReplyResponse response) => response.Error.Errorno;
     protected override IEnumerable<Request> GetRequestsForPage(Page page, CancellationToken stoppingToken = default) =>
     [
-        new Request(Requester.RequestProtoBuf("c/f/pb/floor?cmd=302002", "12.26.1.0",
+        new(Requester.RequestProtoBuf("c/f/pb/floor?cmd=302002", "12.26.1.0",
             new SubReplyRequest {Data = new()
             {
                 Kz = (long)tid,
diff --git a/c#/crawler/src/Tieba/Crawl/Crawler/ThreadArchiveCrawler.cs b/c#/crawler/src/Tieba/Crawl/Crawler/ThreadArchiveCrawler.cs
index 730d4d18..8f5aae2a 100644
--- a/c#/crawler/src/Tieba/Crawl/Crawler/ThreadArchiveCrawler.cs
+++ b/c#/crawler/src/Tieba/Crawl/Crawler/ThreadArchiveCrawler.cs
@@ -12,8 +12,8 @@ protected override IEnumerable<Request> GetRequestsForPage(Page page, Cancellati
             () => new ThreadResponse(), stoppingToken);
         return
         [ // passing CrawlRequestFlag.ThreadClientVersion602 in the second one in order to invokes ThreadParser.ShouldSkipParse()
-            new Request(response),
-            new Request(response, CrawlRequestFlag.ThreadClientVersion602)
+            new(response),
+            new(response, CrawlRequestFlag.ThreadClientVersion602)
         ];
     }
 }
diff --git a/c#/crawler/src/Tieba/Crawl/Crawler/ThreadCrawler.cs b/c#/crawler/src/Tieba/Crawl/Crawler/ThreadCrawler.cs
index 461a1b69..85a3a6e4 100644
--- a/c#/crawler/src/Tieba/Crawl/Crawler/ThreadCrawler.cs
+++ b/c#/crawler/src/Tieba/Crawl/Crawler/ThreadCrawler.cs
@@ -37,11 +37,11 @@ protected override IEnumerable<Request> GetRequestsForPage(Page page, Cancellati
         };
         return
         [
-            new Request(Requester.RequestProtoBuf(EndPointUrl, "12.26.1.0",
+            new(Requester.RequestProtoBuf(EndPointUrl, "12.26.1.0",
                 new ThreadRequest {Data = data},
                 (req, common) => req.Data.Common = common,
                 () => new ThreadResponse(), stoppingToken)),
-            new Request(Requester.RequestProtoBuf(LegacyEndPointUrl, "6.0.2",
+            new(Requester.RequestProtoBuf(LegacyEndPointUrl, "6.0.2",
                 new ThreadRequest {Data = data602},
                 (req, common) => req.Data.Common = common,
                 () => new ThreadResponse(), stoppingToken), CrawlRequestFlag.ThreadClientVersion602)
diff --git a/c#/imagePipeline/src/Consumer/MetadataConsumer.cs b/c#/imagePipeline/src/Consumer/MetadataConsumer.cs
index 67a038d7..7fcd18cd 100644
--- a/c#/imagePipeline/src/Consumer/MetadataConsumer.cs
+++ b/c#/imagePipeline/src/Consumer/MetadataConsumer.cs
@@ -93,6 +93,7 @@ private Func<ImageWithBytes, ImageMetadata> GetImageMetaData
         IEnumerable<ulong> commonXxHash3ToIgnore,
         TImageSharpProfile? profile,
         Func<TImageSharpProfile, byte[]?> rawBytesSelector)
+        where TImageSharpProfile : class
         where TEmbeddedMetadata : class, ImageMetadata.IEmbedded, new()
     {
         if (profile == null) return null;