docs: document FileNotFoundException passthrough behavior in AssemblyLoadContext resolution chain#12419
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…xt resolution chain Co-authored-by: elinor-fung <47805090+elinor-fung@users.noreply.github.com>
…steps 2-4 Co-authored-by: elinor-fung <47805090+elinor-fung@users.noreply.github.com>
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Pull request overview
Documents AssemblyLoadContext assembly resolution behavior where FileNotFoundException is treated as “not found” and resolution continues through later extension points, while other exception types terminate resolution.
Changes:
- Adds a note to
AssemblyLoadContext.Load(AssemblyName)remarks explainingFileNotFoundExceptionpassthrough vs. other exceptions halting resolution. - Adds a note to
AssemblyLoadContext.Resolvingremarks explaining howFileNotFoundExceptionaffects continued resolution toAppDomain.AssemblyResolve.
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gewarren
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Mar 19, 2026
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Per dotnet/runtime#1025: a
FileNotFoundExceptionthrown fromAssemblyLoadContext.Loador aResolvinghandler is treated as "not found" and the resolution chain continues. Any other exception type stops it immediately.Changes
AssemblyLoadContext.Loadremarks —[!NOTE]clarifying thatFileNotFoundExceptionlets the chain continue (ResolvingandAppDomain.AssemblyResolvestill fire); any other exception stops it.AssemblyLoadContext.Resolvingevent remarks —[!NOTE]clarifying that aFileNotFoundExceptionfrom a handler still allowsAppDomain.AssemblyResolveto fire; any other exception stops propagation.