Store a map with each protected build
A rename map is meaningful only with the assembly that produced it. Record the input and output SHA256 hashes, options, assembly identity and map filename together. Keep maps in restricted release storage because they reveal original names. A readable map from another release can produce plausible but incorrect decoded names; a matching file extension or product version string is not enough.
Reproduce an exception you recognize
In a staging copy of the protected application, exercise an existing error path and capture a stack trace without customer secrets. Use the exact map in the stack decoder and check that the expected internal type and method names return. Preserve the original trace and compare unmapped frames as well. Do not publish private traces or maps merely to demonstrate the tool.
Understand empty and partial results
An exported map with no rename entries can be legitimate when no eligible names changed. The decoder should report an unchanged trace rather than invent names. A malformed map and a valid empty map are different situations. Partial output can reflect unchanged public members, dependency frames, generated frames or a mismatched build. Check the build association before treating an unchanged frame as a defect.
Name decoding is not line-number recovery
A rename map restores names; it does not automatically recover source files or line numbers. Symbolication needs the appropriate assembly and compatible debugging symbols, and optimization can affect the frames visible in a trace. Keep the relevant original and protected build artifacts under your retention policy, test diagnostic procedures before release, and do not ship maps to every client unless you intend to reveal their contents.
Get-FileHash ./MyLibrary.obfuscated.dll -Algorithm SHA256
Get-FileHash ./MyLibrary.map.txt -Algorithm SHA256
# Record these with the release ID and protection options.