C# Equivalent from C++ Code

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C++

C#

Hi Experts

Can any one convert c++ code to C#.., I am facing Problem with double Pointer..,

Here is the C++ Code...,

 LUMI_ID_ERROR LumiDeviceCtrl::GetSystemMetrics(DBGroupMetrics** pDBMets, uint &nNumActiveGroups)
{
	SetLastError("");

	if(!GoodHandle())
		return LUMI_ID_GEN_ERROR_ID_OPERATION_FAILED;

	V100_ERROR_CODE	rc = GEN_OK;
	_MX00_DB_METRICS* pSysDBMetrics = NULL;

	rc = V100_ID_Get_System_Metrics(&m_DevHdl, &pSysDBMetrics, nNumActiveGroups);
	if(GEN_OK != rc)
	{
		SetLastError(rc, "V100_ID_Get_System_Metrics");
		goto Exit;
	}

	*pDBMets = new DBGroupMetrics[nNumActiveGroups];

	_MX00_DB_METRICS* pTmpSrc = pSysDBMetrics;
	DBGroupMetrics*   pTmpDst = *pDBMets;

	for(uint ii = 0; ii < nNumActiveGroups; ++ii)
	{
		pTmpDst->nGroupID                = pTmpSrc->nGroupID;
		pTmpDst->nFlags					 = pTmpSrc->nFlags;
		pTmpDst->nMaxUsers               = pTmpSrc->nMaxUsers;
		pTmpDst->nFingersPerUser         = pTmpSrc->nFingersPerUser;
		pTmpDst->nInstancesPerFinger     = pTmpSrc->nInstancesPerFinger;
		pTmpDst->nCurEnrolledUserFingers = pTmpSrc->nCurEnrolledUserFingers;
		pTmpDst->nCurEnrolledUsers		 = pTmpSrc->nCurEnrolledUsers;

		pTmpDst++;
		pTmpSrc++;
	}

Exit:
	if(pSysDBMetrics)
		V100_ID_Release_System_Metrics(&m_DevHdl, pSysDBMetrics);

	return (LUMI_ID_ERROR)rc;
}

The above function GetSystemMetrics has a parameter DBGroupMetrics** pDBMets, DBGroupMetrics is struct

every thing is Ok but when I'm declaring array for the struct in C# I am getting Error..,
this is the line am not able to declare in the C#

*pDBMets = new DBGroupMetrics[nNumActiveGroups];

Thanks & Regards