C++ CLR unmanaged BYTE* to managed System::array<Byte>^ without loop - c++

Question

I tried to find working solution on my qestion, but not found.
I want to "connect" managed C# .NET code with native C++ code (DLL). My C++ returns unmanaged BYTE* pointer and count of elements.
How to initialize new array<Byte>^ from BYTE* without loop? Because it may be to 5 Megabytes. (Encrypting data)
Help if you can please.
EDIT:
With loop it works:
array<Byte>^ a = gcnew array<Byte>(resultDataSize);
for (int i = 0; i < resultDataSize; i++)
{
a[i] = resultData[i];
}
But I'd like get something like:
a = new array<Byte>(resultData, resultDataSize);
EDIT 2:
Now in my C++ i have function:
void Decrypt(BYTE* dataToDecrypt, DWORD dataToDecryptLength, wchar_t* senderName, wchar_t* receiverName, BYTE** result, DWORD* resultSize)
{
...
*result = main.Data;
*resultSize = main.Length;
}
Where main is a class with BYTE* Data and DWORD Length and other functions.
In my CLR:
array<Byte>^ Decrypt(array<Byte>^ dataToDecrypt, String^ senderName, String^ receiverName)
{
...
BYTE* resultData = nullptr;
DWORD resultDataSize = 0;
// Call my c++
DecryptFunction(dataToDecryptBytes, dataToDecrypt->Length, sender, receiver, &resultData, &resultDataSize);
array<Byte>^ result = gcnew array<Byte>(resultDataSize);
for (int i = 0; i < resultDataSize; i++)
{
result[i] = resultData[i];
}
....
return result;
}
In C#:
byte[] data = ...;
...
byte[] decrypted = provider.Decrypt(data, "user1", "user2");
...