Cache CommandLineOption from the providers

src/Platform/Microsoft.Testing.Platform/CommandLine/CommandLineManager.cs

@@ -39,7 +39,7 @@ internal async Task<CommandLineHandler> BuildAsync(string[] args, IPlatformOutpu
                 await async.InitializeAsync();
             }
 
-            commandLineOptionsProviders.Add(serviceInstance);
+            commandLineOptionsProviders.Add(new CommandLineOptionsProviderCache(serviceInstance));
         }
 
         ICommandLineOptionsProvider[] systemCommandLineOptionsProviders = new[]

src/Platform/Microsoft.Testing.Platform/CommandLine/CommandLineOptionsProviderCache.cs

@@ -0,0 +1,37 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Microsoft.Testing.Platform.Extensions;
+using Microsoft.Testing.Platform.Extensions.CommandLine;
+
+namespace Microsoft.Testing.Platform.CommandLine;
+
+internal struct CommandLineOptionsProviderCache(ICommandLineOptionsProvider commandLineOptionsProvider) : ICommandLineOptionsProvider
+{
+    private readonly ICommandLineOptionsProvider _commandLineOptionsProvider = commandLineOptionsProvider;
+    private CommandLineOption[]? _commandLineOptions;
+
+    public readonly string Uid => _commandLineOptionsProvider.Uid;
+
+    public readonly string Version => _commandLineOptionsProvider.Version;
+
+    public readonly string DisplayName => _commandLineOptionsProvider.DisplayName;
+
+    public readonly string Description => _commandLineOptionsProvider.Description;
+
+    public IReadOnlyCollection<CommandLineOption> GetCommandLineOptions()
+    {
+        _commandLineOptions ??= _commandLineOptionsProvider.GetCommandLineOptions().ToArray();
+
+        return _commandLineOptions;
+    }
+
+    public readonly Task<bool> IsEnabledAsync()
+        => _commandLineOptionsProvider.IsEnabledAsync();
+
+    public readonly Task<ValidationResult> ValidateCommandLineOptionsAsync(ICommandLineOptions commandLineOptions)
+        => _commandLineOptionsProvider.ValidateCommandLineOptionsAsync(commandLineOptions);
+
+    public readonly Task<ValidationResult> ValidateOptionArgumentsAsync(CommandLineOption commandOption, string[] arguments)
+        => _commandLineOptionsProvider.ValidateOptionArgumentsAsync(commandOption, arguments);
+}