GCHandle to get address(pointer) of .net object

Question

I managed to get the address of a .net object by

GCHandle objHandle = GCHandle.Alloc(obj,GCHandleType.WeakTrackResurrection);
int address = GCHandle.ToIntPtr         


        

Answer 1

You'll want to pin the GCHandle to stop the object moving around, as the GC moves objects around, so an unpinned pointer could become invalid. Pinning the object stops it moving:

GCHandle handle = GCHandle.Alloc(obj, GCHandleType.Pinned);
IntPtr ptr = handle.AddrOfPinnedObject();

You'll also have to free the handle when you're done:

handle.Free();