Fix culture issues on testhost provider

src/Microsoft.TestPlatform.TestHostProvider/Hosting/DefaultTestHostManager.cs

@@ -429,7 +429,7 @@ private IEnumerable<string> FilterExtensionsBasedOnVersion(IEnumerable<string> e
         // Log warning if conflicting version extensions are found
         if (conflictingExtensions.Any())
         {
-            var extensionsString = string.Join("\n", conflictingExtensions.Select(kv => string.Format("  {0} : {1}", kv.Key, kv.Value)));
+            var extensionsString = string.Join("\n", conflictingExtensions.Select(kv => $"  {kv.Key} : {kv.Value}"));
             string message = string.Format(CultureInfo.CurrentCulture, Resources.MultipleFileVersions, extensionsString);
             _messageLogger.SendMessage(TestMessageLevel.Warning, message);
         }

src/Microsoft.TestPlatform.TestHostProvider/Hosting/DotnetTestHostManager.cs

@@ -5,6 +5,7 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -435,7 +436,7 @@ public virtual TestProcessStartInfo GetTestHostProcessStartInfo(
                 PlatformArchitecture finalTargetArchitecture = forceToX64 ? PlatformArchitecture.X64 : targetArchitecture;
                 if (!_dotnetHostHelper.TryGetDotnetPathByArchitecture(finalTargetArchitecture, out string? muxerPath))
                 {
-                    string message = string.Format(Resources.NoDotnetMuxerFoundForArchitecture, $"dotnet{(_platformEnvironment.OperatingSystem == PlatformOperatingSystem.Windows ? ".exe" : string.Empty)}", finalTargetArchitecture.ToString());
+                    string message = string.Format(CultureInfo.CurrentCulture, Resources.NoDotnetMuxerFoundForArchitecture, $"dotnet{(_platformEnvironment.OperatingSystem == PlatformOperatingSystem.Windows ? ".exe" : string.Empty)}", finalTargetArchitecture.ToString());
                     EqtTrace.Error(message);
                     throw new TestPlatformException(message);
                 }