diff --git a/.github/workflows/minio-dotnet.yml b/.github/workflows/minio-dotnet.yml
index e3a9952136..01b4b31bc4 100644
--- a/.github/workflows/minio-dotnet.yml
+++ b/.github/workflows/minio-dotnet.yml
@@ -175,7 +175,7 @@ jobs:
             sudo cp /tmp/minio-config/certs/public.crt /etc/ssl/certs/
             sudo cp /tmp/minio-config/certs/private.key /etc/ssl/private/
             /tmp/minio -C /tmp/minio-config server /tmp/fs{1...4} &
-            dotnet Minio.Functional.Tests/bin/Release/net6.0/Minio.Functional.Tests.dll
+            dotnet Minio.Functional.Tests/bin/Release/net7.0/Minio.Functional.Tests.dll
 
   push_to_nuget:
     needs: [build, unit_tests, functional_tests, format-check]
diff --git a/.gitignore b/.gitignore
index 88bda8272a..0d595d7e63 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@
 bld/
 [Bb]in/
 [Oo]bj/
+.history
 
 # Visual Studio 2015 cache/options directory
 .vs/
diff --git a/Minio.Functional.Tests/Minio.Functional.Tests.csproj b/Minio.Functional.Tests/Minio.Functional.Tests.csproj
index 741c33eadb..7e1e0a17fa 100644
--- a/Minio.Functional.Tests/Minio.Functional.Tests.csproj
+++ b/Minio.Functional.Tests/Minio.Functional.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <IsPackable>False</IsPackable>
   </PropertyGroup>
diff --git a/Minio.Tests/DateTimeTests.cs b/Minio.Tests/DateTimeTests.cs
index a1be75dd69..515a09cc7b 100644
--- a/Minio.Tests/DateTimeTests.cs
+++ b/Minio.Tests/DateTimeTests.cs
@@ -1,4 +1,5 @@
-using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Globalization;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
 using Minio.DataModel;
 using Minio.DataModel.Args;
 using Minio.Helper;
@@ -55,7 +56,10 @@ public void TestNewMultipartUploadArgsRetentionUntilDate()
     public void TestObjectStatExpires()
     {
         var d = TruncateMilliseconds(DateTime.Now);
-        var headers = new Dictionary<string, string> { ["x-amz-expiration"] = d.ToUniversalTime().ToString("r") };
+        var headers = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase)
+        {
+            ["x-amz-expiration"] = d.ToUniversalTime().ToString("r", CultureInfo.InvariantCulture)
+        };
         var stat = ObjectStat.FromResponseHeaders("test", headers);
         Assert.AreEqual(d.ToUniversalTime(), stat.Expires?.ToUniversalTime());
     }
@@ -64,7 +68,7 @@ public void TestObjectStatExpires()
     public void TestObjectStatObjectLockRetainUntilDate()
     {
         var d = TruncateMilliseconds(DateTime.Now);
-        var headers = new Dictionary<string, string>
+        var headers = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase)
         {
             ["x-amz-object-lock-retain-until-date"] = d.ToUniversalTime().ToString("O")
         };
@@ -77,7 +81,7 @@ public void TestUtilsTo8601String()
     {
         var d = TruncateMilliseconds(DateTime.Now);
         var converted = Utils.To8601String(d);
-        var parsed = DateTime.Parse(converted);
+        var parsed = DateTime.Parse(converted, CultureInfo.InvariantCulture);
         Assert.AreEqual(d, parsed);
         Assert.AreEqual(d.Kind, parsed.Kind);
     }
diff --git a/Minio/MinioClient.cs b/Minio/MinioClient.cs
index 73171d23b2..f1ee8efda0 100644
--- a/Minio/MinioClient.cs
+++ b/Minio/MinioClient.cs
@@ -190,12 +190,9 @@ private async Task<string> GetRegion(string bucketName)
 
         // Pick region from location HEAD request
         if (rgn?.Length == 0)
-        {
-            if (!BucketRegionCache.Instance.Exists(bucketName))
-                rgn = await BucketRegionCache.Update(this, bucketName).ConfigureAwait(false);
-            else
-                rgn = BucketRegionCache.Instance.Region(bucketName);
-        }
+            rgn = BucketRegionCache.Instance.Exists(bucketName)
+                ? await BucketRegionCache.Update(this, bucketName).ConfigureAwait(false)
+                : BucketRegionCache.Instance.Region(bucketName);
 
         // Defaults to us-east-1 if region could not be found
         return rgn?.Length == 0 ? "us-east-1" : rgn;