[release/6.0] fix TLS 1.3 in WinHttpHandler

src/libraries/Common/tests/TestUtilities/System/PlatformDetection.Windows.cs

@@ -57,6 +57,9 @@ public static partial class PlatformDetection
 
         public static bool IsWindows10Version2004Build19573OrGreater => IsWindowsVersionOrLater(10, 0, 19573);
 
+        // Windows 11 aka 21H2
+        public static bool IsWindows10Version22000OrGreater => IsWindowsVersionOrLater(10, 0, 22000);
+
         public static bool IsWindowsIoTCore
         {
             get

src/libraries/System.Diagnostics.EventLog/tests/System/Diagnostics/Reader/EventLogRecordTests.cs

@@ -90,7 +90,8 @@ public void ToXml()
         [ConditionalFact(typeof(Helpers), nameof(Helpers.SupportsEventLogs))]
         public void ExceptionOnce()
         {
-            if (PlatformDetection.IsWindows7) // Null events in PowerShell log
+            if (PlatformDetection.IsWindows7 ||  // Null events in PowerShell log
+                PlatformDetection.IsWindows10Version22000OrGreater) // ActiveIssue("https://github.com/dotnet/runtime/issues/58829")
                 return;
             var query = new EventLogQuery("Application", PathType.LogName, "*[System]") { ReverseDirection = true };
             var eventLog = new EventLogReader(query, Helpers.GetBookmark("Application", PathType.LogName));

src/libraries/System.Diagnostics.EventLog/tests/System/Diagnostics/Reader/ProviderMetadataTests.cs

@@ -23,6 +23,9 @@ public void SourceDoesNotExist_Throws()
         [InlineData(false)]
         public void ProviderNameTests(bool noProviderName)
         {
+            if (PlatformDetection.IsWindows10Version22000OrGreater) // ActiveIssue("https://github.com/dotnet/runtime/issues/58829")
+                return;
+
             string log = "Application";
             string source = "Source_" + nameof(ProviderNameTests);
             using (var session = new EventLogSession())

src/libraries/System.Net.Http.WinHttpHandler/src/System/Net/Http/WinHttpHandler.cs

@@ -44,7 +44,7 @@ public class WinHttpHandler : HttpMessageHandler
 
         private static readonly StringWithQualityHeaderValue s_gzipHeaderValue = new StringWithQualityHeaderValue("gzip");
         private static readonly StringWithQualityHeaderValue s_deflateHeaderValue = new StringWithQualityHeaderValue("deflate");
-        private static readonly Lazy<bool> s_supportsTls13 = new Lazy<bool>(CheckTls13Support());
+        private static readonly Lazy<bool> s_supportsTls13 = new Lazy<bool>(() => CheckTls13Support());
 
         [ThreadStatic]
         private static StringBuilder? t_requestHeadersBuilder;