Introduce WixToolsetServiceProvider

Using a service provider allows all of WixToolset.Core's internal
functionality to be abstracted behind interfaces in WixToolset.Extensibility.
The service provide can also control what interfaces are singletons.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/WixToolset.Core/CommandLine/VersionCommand.cs b/src/WixToolset.Core/CommandLine/VersionCommand.cs
index d13e07a3..12941bdc 100644
--- a/src/WixToolset.Core/CommandLine/VersionCommand.cs
+++ b/src/WixToolset.Core/CommandLine/VersionCommand.cs
@@ -1,9 +1,10 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
-using System;
-
 namespace WixToolset.Core
 {
+    using System;
+    using WixToolset.Extensibility.Services;
+
     internal class VersionCommand : ICommandLineCommand
     {
         public int Execute()