diff --git a/backend/src/Migrations/Migrations/ConvertEventStore.cs b/backend/src/Migrations/Migrations/ConvertEventStore.cs
index c595be1e7..144e184df 100644
--- a/backend/src/Migrations/Migrations/ConvertEventStore.cs
+++ b/backend/src/Migrations/Migrations/ConvertEventStore.cs
@@ -48,7 +48,7 @@ public sealed class ConvertEventStore : MongoBase<BsonDocument>, IMigration
 
             await collection.Find(FindAll).ForEachAsync(async commit =>
             {
-                foreach (BsonDocument @event in commit["Events"].AsBsonArray)
+                foreach (BsonDocument @event in commit["Events"].AsBsonArray.OfType<BsonDocument>())
                 {
                     var meta = BsonDocument.Parse(@event["Metadata"].AsString);
 
diff --git a/backend/src/Migrations/Migrations/ConvertEventStoreAppId.cs b/backend/src/Migrations/Migrations/ConvertEventStoreAppId.cs
index 7c5f88765..f0ef17e7b 100644
--- a/backend/src/Migrations/Migrations/ConvertEventStoreAppId.cs
+++ b/backend/src/Migrations/Migrations/ConvertEventStoreAppId.cs
@@ -53,7 +53,7 @@ public sealed class ConvertEventStoreAppId : MongoBase<BsonDocument>, IMigration
 
                 var index = 0;
 
-                foreach (BsonDocument @event in commit["Events"].AsBsonArray)
+                foreach (BsonDocument @event in commit["Events"].AsBsonArray.OfType<BsonDocument>())
                 {
                     var data = BsonDocument.Parse(@event["Payload"].AsString);
 
diff --git a/backend/src/Squidex.Domain.Apps.Core.Operations/ExtractReferenceIds/StringReferenceExtractor.cs b/backend/src/Squidex.Domain.Apps.Core.Operations/ExtractReferenceIds/StringReferenceExtractor.cs
index 7449db7ae..9374c4698 100644
--- a/backend/src/Squidex.Domain.Apps.Core.Operations/ExtractReferenceIds/StringReferenceExtractor.cs
+++ b/backend/src/Squidex.Domain.Apps.Core.Operations/ExtractReferenceIds/StringReferenceExtractor.cs
@@ -80,7 +80,7 @@ public sealed class StringReferenceExtractor
 
         foreach (var pattern in contentsPatterns)
         {
-            foreach (Match match in pattern.Matches(text))
+            foreach (Match match in pattern.Matches(text).OfType<Match>())
             {
                 yield return DomainId.Create(match.Groups["Id"].Value);
             }
@@ -96,7 +96,7 @@ public sealed class StringReferenceExtractor
 
         foreach (var pattern in assetsPatterns)
         {
-            foreach (Match match in pattern.Matches(text))
+            foreach (Match match in pattern.Matches(text).OfType<Match>())
             {
                 yield return DomainId.Create(match.Groups["Id"].Value);
             }
diff --git a/backend/src/Squidex.Domain.Apps.Core.Operations/HandleRules/RuleContext.cs b/backend/src/Squidex.Domain.Apps.Core.Operations/HandleRules/RuleContext.cs
index 6afb52d96..d73ae39c8 100644
--- a/backend/src/Squidex.Domain.Apps.Core.Operations/HandleRules/RuleContext.cs
+++ b/backend/src/Squidex.Domain.Apps.Core.Operations/HandleRules/RuleContext.cs
@@ -10,7 +10,7 @@ using Squidex.Infrastructure;
 
 namespace Squidex.Domain.Apps.Core.HandleRules;
 
-public struct RuleContext
+public readonly struct RuleContext
 {
     public NamedId<DomainId> AppId { get; init; }
 
diff --git a/backend/src/Squidex.Domain.Apps.Entities/Apps/Templates/TemplatesClient.cs b/backend/src/Squidex.Domain.Apps.Entities/Apps/Templates/TemplatesClient.cs
index 6becd489b..7717037bc 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/Apps/Templates/TemplatesClient.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/Apps/Templates/TemplatesClient.cs
@@ -37,7 +37,7 @@ public sealed class TemplatesClient
 
                 var text = await httpClient.GetStringAsync(url, ct);
 
-                foreach (Match match in Regex.Matches(text))
+                foreach (Match match in Regex.Matches(text).OfType<Match>())
                 {
                     var currentName = match.Groups["Name"].Value;
 
@@ -65,7 +65,7 @@ public sealed class TemplatesClient
 
                 var text = await httpClient.GetStringAsync(url, ct);
 
-                foreach (Match match in Regex.Matches(text))
+                foreach (Match match in Regex.Matches(text).OfType<Match>())
                 {
                     var title = match.Groups["Title"].Value;
 
diff --git a/backend/src/Squidex.Infrastructure/Queries/PropertyPath.cs b/backend/src/Squidex.Infrastructure/Queries/PropertyPath.cs
index 4aae953e7..f44bd7ee8 100644
--- a/backend/src/Squidex.Infrastructure/Queries/PropertyPath.cs
+++ b/backend/src/Squidex.Infrastructure/Queries/PropertyPath.cs
@@ -88,13 +88,6 @@ public sealed class PropertyPath : ReadonlyList<string>
         return string.Join(".", this);
     }
 
-    private static string Unescape(string source)
-    {
-        return source
-            .Replace("\\/", "/", StringComparison.OrdinalIgnoreCase)
-            .Replace("\\.", ".", StringComparison.OrdinalIgnoreCase);
-    }
-
     private static PropertyPath Create(IEnumerable<string>? source)
     {
         var inner = source?.ToList();
diff --git a/backend/src/Squidex.Shared/Texts.cs b/backend/src/Squidex.Shared/Texts.cs
index e6f368c66..06d13d5ab 100644
--- a/backend/src/Squidex.Shared/Texts.cs
+++ b/backend/src/Squidex.Shared/Texts.cs
@@ -15,15 +15,7 @@ namespace Squidex.Shared
 
         public static ResourceManager ResourceManager
         {
-            get
-            {
-                if (resourceManager == null)
-                {
-                    resourceManager = new ResourceManager("Squidex.Shared.Texts", typeof(Texts).Assembly);
-                }
-
-                return resourceManager;
-            }
+            get => resourceManager ??= new ResourceManager("Squidex.Shared.Texts", typeof(Texts).Assembly);
         }
     }
 }
diff --git a/backend/src/Squidex/Areas/Api/Controllers/Backups/RestoreController.cs b/backend/src/Squidex/Areas/Api/Controllers/Backups/RestoreController.cs
index af3c96068..aed62a568 100644
--- a/backend/src/Squidex/Areas/Api/Controllers/Backups/RestoreController.cs
+++ b/backend/src/Squidex/Areas/Api/Controllers/Backups/RestoreController.cs
@@ -66,7 +66,7 @@ public class RestoreController : ApiController
     [ApiPermission(PermissionIds.AdminRestore)]
     public async Task<IActionResult> PostRestoreJob([FromBody] RestoreRequestDto request)
     {
-        await backupService.StartRestoreAsync(User.Token()!, request.Url, request.Name);
+        await backupService.StartRestoreAsync(User.Token()!, request.Url, request.Name, HttpContext.RequestAborted);
 
         return NoContent();
     }
diff --git a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryDedicatedIntegrationTests.cs b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryDedicatedIntegrationTests.cs
index 5a04f1f41..a734d1c4e 100644
--- a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryDedicatedIntegrationTests.cs
+++ b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryDedicatedIntegrationTests.cs
@@ -7,9 +7,6 @@
 
 using Xunit;
 
-#pragma warning disable SA1300 // Element should begin with upper-case letter
-#pragma warning disable MA0048 // File name must match type name
-
 namespace Squidex.Domain.Apps.Entities.Contents.MongoDb;
 
 [Trait("Category", "Dependencies")]
diff --git a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryTestsBase.cs b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryTestsBase.cs
index 6ef5300f0..4de91090b 100644
--- a/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryTestsBase.cs
+++ b/backend/tests/Squidex.Domain.Apps.Entities.Tests/Contents/MongoDb/ContentsQueryTestsBase.cs
@@ -14,7 +14,6 @@ using Xunit;
 using F = Squidex.Infrastructure.Queries.ClrFilter;
 
 #pragma warning disable SA1300 // Element should begin with upper-case letter
-#pragma warning disable MA0048 // File name must match type name
 
 namespace Squidex.Domain.Apps.Entities.Contents.MongoDb;