A cross process cursor is an extension of a Android.Database.ICursor that also supports usage from remote processes.

The contents of a cross process cursor are marshalled to the remote process by filling Android.Database.CursorWindow objects using ICrossProcessCursor.FillWindow(int, Android.Database.CursorWindow). As an optimization, the cursor can provide a pre-filled window to use via ICrossProcessCursor.Window thereby obviating the need to copy the data to yet another cursor window.

[Android Documentation]