I don't think matlab has any way to access directly the unmanaged memory pointed to by the IntPtr as that would normally be wrapped in an unsafe block.
All I can think of is going through the marshalling methods to make a copy to managed memory and get that through matlab. However, I'm not experienced enough with that aspect of .Net to be sure it is really going to work:
netarray = NET.createArray('System.Double', yourobject.Count); %allocate managed array to receive copy of unmanaged data
System.Runtime.InteropServices.Marshal.Copy(yourobject.PointerToFirstElement, netarray, 0, yourobject.Count); %copy unmanaged to managed
data = double(netarray); %convert to matlab array
If I got it wrong, it is very likely to crash matlab.
