With recognition on the ILAst and reference substitution during
translation, the four accessor-body patterns in
PatternStatementTransform were only reachable as a fallback, and any
divergence between them and the AutoEventDecompiler verdict produced
inconsistent output. A compiler shape the ILAst matchers do not know now
degrades to explicit accessors with the backing field kept in the
output, which stays compilable. Bodyless events (abstract, extern,
interface members) previously relied on the patterns' no-body clause to
become field-like; since C# cannot express bodyless custom accessors,
DoDecompile now chooses the field-like form for them directly. Also
deletes the orphaned IsEventBackingFieldName helper; the name
association lives in PropertyAndEventBackingFieldLookup.
Assisted-by: Claude:claude-fable-5:Claude Code
Claude-Session: https://claude.ai/code/session_01Btdypgm8utyxqt1Etn2BDi
Siegfried Pammer