There was no way to mark and return to interesting spots in decompiled
code. This adds a flat (no folders, no labels) bookmark list: toggle on a
line from the context menu, the gutter, or Ctrl+B; see an icon in a new
left-margin gutter that honours a disabled state; and manage the list in a
dockable pane that auto-registers in the Window menu.
Bookmarks anchor by metadata token, never by a raw line number, so they
survive re-decompilation and decompiler-setting changes that reflow the C#
text: a definition line anchors to its token, while a line inside a method
body anchors to the method token plus an IL offset. Recovering an IL offset
needs the decompiler's sequence points, which the normal C# output did not
carry, so they are captured once at the WriteCode chokepoint and stored as a
per-document line/offset map. The map is also what places gutter icons and
scrolls navigation to the exact line.
The list persists to an ILSpy.Bookmarks.json sidecar next to ILSpy.xml; the
path logic is extracted into AppEnv/ConfigurationFiles so the dock layout
sidecar shares it. Navigating to a bookmark loads its assembly from disk if
it dropped out of the list (and only then offers to remove a bookmark whose
file is gone), then centres the line and plays a brief line flash plus a
gutter-icon pulse. Disabled bookmarks stay visible but are skipped by the
next/previous actions.
Assisted-by: Claude:claude-opus-4-8:Claude Code