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diff --git a/src/inc/shim/shimselector.h b/src/inc/shim/shimselector.h
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+++ b/src/inc/shim/shimselector.h
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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+//
+// shimselector.h
+//
+// Class that select the best runtime
+//
+// Note: very similar to RuntimeSelector but is so simple that adding a common template parent class is not worth it
+//
+// Note: must be platform independent
+//
+// ======================================================================================
+
+#ifndef SHIMSELECTOR_H
+#define SHIMSELECTOR_H
+
+// does not currently need to add anything to VersionAndLocationInfo
+#include "versionandlocationinfo.h"
+typedef VersionAndLocationInfo ShimInfo;
+
+class ShimSelector
+{
+protected:
+    VersionInfo m_Baseline;   // base line to compare against
+    ShimInfo m_Best;             // best found so far
+    bool m_bHasSomething;  // has any data
+public:
+
+    //constructor
+    ShimSelector();
+
+    // whether the given info is better than the base line
+    bool IsAcceptable(const ShimInfo& shimInfo)  const;
+
+    // add shim info
+    HRESULT Add(const ShimInfo& shimInfo);
+
+    //set the base line
+    void SetBaseline(const VersionInfo& version);
+
+    // get the best found
+    ShimInfo GetBest();
+
+    // has any useful data
+    bool HasUsefulShimInfo();
+
+    // is 1st better than 2nd
+    static bool IsBetter(const ShimInfo& ri1, const ShimInfo& ri2);
+};
+
+
+#include "shimselector.inl"
+
+#endif // SHIMSELECTOR_H