Optimal way to convert a Managed C++ struct to native C++ which contain array of structs viceversa

See more:

C++

C++/CLI

In Native C++, the structure looks like below.

typedef struct _DB_EMPLOYEE_DETAILS_N
{
	OUT  ULONG               ulNumber;
	OUT  BOOLEAN             bActive;
	OUT  BOOLEAN             bPermanent;
} DB_EMPLOYEE_DETAILS_N, *PDB_EMPLOYEE_DETAILS_N;


typedef struct _Final_EmployeeDB_N  {
	OUT ULONG                      ulcount;
	OUT DB_EMPLOYEE_DETAILS_N   stEmployeeArgs[30];
} Final_EmployeeDB_N, *PFinal_EmployeeDB_N;

In Managed C++, the structure looks like below.

[StructLayoutAttribute(LayoutKind::Sequential, Pack = 1)]
public value struct EMPLOYEE_DETAILS_CLR
{
public:
	UInt32					ulNumber;
	[MarshalAsAttribute(UnmanagedType::I1)]
	bool					bActive;
	[MarshalAsAttribute(UnmanagedType::I1)]
	bool					bPermanent;
};

[StructLayoutAttribute(LayoutKind::Sequential, Pack = 1)]
public ref class EmployeeDB_CLR  {
public:
	UInt32									ulcount;
	array<EMPLOYEE_DETAILS_CLR>   ^stEmployeeArgs = gcnew array<EMPLOYEE_DETAILS_CLR>(30);
};

I need help in two aspects.
1) How to declare the fixed size array in Managed C++? I got some info from the Link to declare as inline_array. But is there any other way to perform this operation?

2) I want to convert the structures from managed C++ to native C++ and viceversa.

The below code converts the managed code to unmanaged.
I could achieve this in two ways:
1)

	EmployeeDB_CLR ^hclrDetails; //assume data is present here

IntPtr UnmanagedMemAddr = Marshal::AllocHGlobal(Marshal::SizeOf(hclrDetails->stEmployeeArgs[0]));

		Final_EmployeeDB_N stDetails = { 0 };
		PFinal_EmployeeDB_N pDetails = &stDetails;
		
		stDetails.ulcount = hclrDetails->ulcount;
		for (int i = 0; i < hEnumDeviceArgs->stEmployeeArgs->Length; i++)
		{
			// Copy the managed struct to unmanaged memory.
			Marshal::StructureToPtr(hclrDetails->stEmployeeArgs[i],
				UnmanagedMemAddr,
				false);

			stDetails.stEmployeeArgs[i] = *static_cast<PDB_EMPLOYEE_DETAILS_N>(UnmanagedMemAddr.ToPointer());
		}

2) I tried by using pin_Ptr<> and memcpy and it worked.

        EmployeeDB_CLR ^hclrDetails; //assume data is present here
        Final_EmployeeDB_N stDetails = { 0 };

pin_ptr<EMPLOYEE_DETAILS_CLR> tempPtr = &(hclrDetails->stEmployeeArgs[0]);
memcpy(stDetails.stEmployeeArgs, tempPtr, hclrDetails->stEmployeeArgs->Length);

Any suggestions are welcome. Thanks in advance.