Marshalling a pointer to an array of structures (C/C++/C# Interop)

MarshalPtrToStructureArray.cs

public unsafe static void MarshalPtrToStructureArray<T>(IntPtr sPtr, ulong arrSize, ref T[] output) where T : unmanaged
{
    fixed (T* dPtr = output)
    {
        ulong dataSize = arrSize * (uint)Marshal.SizeOf(typeof(T));
        Unsafe.CopyBlock(dPtr, (void*)sPtr, (uint)dataSize);
        
        // Alternatively, .NET Framework >= 4.6
        // ulong dataSize = arrSize * (uint)Marshal.SizeOf<T>();
        // Buffer.MemoryCopy((void*)sPtr, dPtr, dataSize, dataSize);
    }
}