diff --git a/src/Core/EnumerableExtensions.cs b/src/Core/EnumerableExtensions.cs
index a35d608..289951e 100644
--- a/src/Core/EnumerableExtensions.cs
+++ b/src/Core/EnumerableExtensions.cs
@@ -131,8 +131,10 @@ public static IEnumerable<object> Flatten(this IEnumerable @this) =>
 
     // copy to collection
 
+#   if !NET8_0_OR_GREATER
     public static Dictionary<TKey, TValue> ToDictionary<TKey, TValue>(this IEnumerable<(TKey key, TValue value)> @this) where TKey: notnull =>
         @this.ToDictionary(item => item.key, item => item.value);
+#   endif
 
     public static Queue<T> ToQueue<T>(this IEnumerable<T> @this) =>
         new(@this);
diff --git a/src/Core/FileStreamNativeExtensions.t.cs b/src/Core/FileStreamNativeExtensions.t.cs
index 6ddc11f..e61924a 100644
--- a/src/Core/FileStreamNativeExtensions.t.cs
+++ b/src/Core/FileStreamNativeExtensions.t.cs
@@ -1,3 +1,5 @@
+using System.ComponentModel;
+
 #pragma warning disable CA1001
 class FileStreamNativeExtensionsTests : TestFileSystemFixture
 #pragma warning restore CA1001
@@ -58,6 +60,13 @@ public void WasFileDeleted_WithDeletedAndRecreatedFile_ReturnsTrue()
     public void WasFileDeleted_WithClosedFile_Throws()
     {
         _stream.Close();
+
+        #if NET8_0_OR_GREATER
+        Should
+            .Throw<Win32Exception>(() => _stream.WasFileDeleted())
+            .Message.ShouldContain("GetFileInformationByHandleEx() failed");
+        #else
         Should.Throw<ObjectDisposedException>(() => _stream.WasFileDeleted());
+        #endif
     }
 }