[dotnet] [bidi] BiDi class is not inheritable

Author: nvborisenko

dotnet/src/webdriver/BiDi/BiDi.cs

@@ -24,7 +24,7 @@
 
 namespace OpenQA.Selenium.BiDi;
 
-public class BiDi : IAsyncDisposable
+public sealed class BiDi : IAsyncDisposable
 {
     private readonly Broker _broker;
 
@@ -170,13 +170,8 @@ public Task EndAsync(Session.EndOptions? options = null)
     }
 
     public async ValueTask DisposeAsync()
-    {
-        await DisposeAsyncCore();
-        GC.SuppressFinalize(this);
-    }
-
-    protected virtual async ValueTask DisposeAsyncCore()
     {
         await _broker.DisposeAsync().ConfigureAwait(false);
+        GC.SuppressFinalize(this);
     }
 }