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diff --git a/src/md/hotdata/hotheap.h b/src/md/hotdata/hotheap.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.
+// 
+// File: HotHeap.h
+// 
+
+// 
+// Class code:MetaData::HotHeap represents a hot heap in MetaData hot stream.
+// 
+// ======================================================================================
+
+#pragma once
+
+#include "external.h"
+
+namespace MetaData
+{
+
+// Forward declarations
+struct HotHeapHeader;
+
+// --------------------------------------------------------------------------------------
+// 
+// This class represents a hot heap in MetaData hot stream.
+// 
+class HotHeap
+{
+    friend class VerifyLayoutsMD;
+private:
+    struct HotHeapHeader *m_pHotHeapHeader;
+    
+private:
+    friend class HotHeapsDirectoryIterator;
+    
+    // Initializes hot heap from its header and data.
+    __checkReturn 
+    HRESULT Initialize(struct HotHeapHeader *pHotHeapHeader, DataBuffer hotHeapData);
+    
+public:
+    HotHeap()
+        { m_pHotHeapHeader = NULL; }
+    HotHeap(const HotHeap &source)
+        { m_pHotHeapHeader = source.m_pHotHeapHeader; }
+    
+    void Clear()
+        { m_pHotHeapHeader = NULL; }
+    
+    // Gets stored data at index.
+    // Returns S_FALSE if data index is not stored in hot heap.
+    __checkReturn 
+    HRESULT GetData(
+             UINT32    nDataIndex, 
+        __out DataBlob *pData);
+    
+    inline BOOL IsEmpty() const
+        { return m_pHotHeapHeader == NULL; }
+    
+#ifdef _DEBUG_METADATA
+    // Validates hot heap structure (extension of code:Initialize checks).
+    __checkReturn 
+    HRESULT Debug_Validate();
+#endif //_DEBUG_METADATA
+    
+};  // class HotHeap
+
+};  // namespace MetaData