Initial work on an automated VSIX testing tool. Not working or tested yet.

FossilOrigin-Name: 496e4ac984b2548dd5f2f969cd34656b586cfcfe

vsixtest/MainPage.xaml.h

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+//
+// MainPage.xaml.h
+// Declaration of the MainPage class.
+//
+
+#pragma once
+
+#include "MainPage.g.h"
+
+namespace vsixtest
+{
+	/// <summary>
+	/// An empty page that can be used on its own or navigated to within a Frame.
+	/// </summary>
+	public ref class MainPage sealed
+	{
+	public:
+		MainPage();
+
+	};
+}