Add RAII for PIDL types (BSTR-style) and FreeWith(CoTaskMemFree) for CoTaskMem string out-params#2276

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antmor:user/antmor/pidl-ilfree-safehandle

Commits on Jul 11, 2026

Add RAII (ILFree) annotation for PIDL types so CsWin32 generates a SafeHandle

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Rework PIDL RAII to BSTR-style typedef; add FreeWith(CoTaskMemFree) for string out-params

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Fix namespace cycle: co-locate PIDL typedefs and ILFree in Shell.Common

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