C++ to C# Code Conversion problem

Hi All,

I am trying to convert the following C++ code to C#.

pExportDir = (PIMAGE_EXPORT_DIRECTORY)GetPtrFromRVA(exportsStartRVA, pNTHeader, pImageBase);

C# Syntax (Toggle Plain Text)

Code:

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template <class T> LPVOID GetPtrFromRVA( DWORD rva, T* pNTHeader, PBYTE imageBase ) // 'T' = PIMAGE_NT_HEADERS
{
        PIMAGE_SECTION_HEADER pSectionHdr;
        INT delta;
        INT delta2;
 
        pSectionHdr = GetEnclosingSectionHeader( rva, pNTHeader );
        if ( !pSectionHdr )
                return 0;
 
        delta = (INT)(pSectionHdr->VirtualAddress-pSectionHdr->PointerToRawData);
        delta2 =  (INT)( imageBase + rva - delta );
        return (PVOID) ( imageBase + rva - delta );
}

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The above function will return a "ExportDirectory" structure. Which is working fine in C++. I wrote the same function in C# like below

export_table = GetPtrFromRVA <IMAGE_EXPORT_DIRECTORY>(ExportTable_rva, _sectionHeaders[0], _dosHeader.e_magic);

C# Syntax (Toggle Plain Text)

Code:

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public T GetPtrFromRVA<T>(UInt32 ExportTable_rva, IMAGE_SECTION_HEADER _sectionHeaders, UInt16 magic)
    {
        IMAGE_SECTION_HEADER textsectionHeader;
        int delta;
 
        textsectionHeader = GetEnclosingSectionHeader(ExportTable_rva, _sectionHeaders);
        //if (textsectionHeader == null)
        //    return 0;
 
        delta = (int)(_sectionHeaders.VirtualAddress - _sectionHeaders.PointerToRawData);
        GCHandle handle = GCHandle.Alloc((magic + ExportTable_rva - delta), GCHandleType.Pinned);
        T theStructure = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
        // Deallocate pointer
        handle.Free();
        return theStructure;
 
    }

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Please see the attachments for the C++ and C# outputs i am getting....