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Fix DispatchProxy Generator Issues with AssemblyLoadContexts #120157

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Fix DispatchProxy Generator Issues with AssemblyLoadContexts #120157

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@afifi-ins afifi-ins commented Sep 26, 2025 •
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This PR fixes two scenarios where DispatchProxy behaves incorrectly when working with multiple AssemblyLoadContexts (ALCs).
Fixes:

  1. Corrects proxy generation where the second ALC could produce a proxy bound to the wrong interface type, leading to InvalidCastException.
  2. Fixes the case of creating a proxy when the base proxyType is in a non-collectable ALC (in this case the default ALC) and the interface is in a collectable ALC.

Added Unit test to prevent regressions.

Fixes: #109398

@github-actions github-actions bot added the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Sep 26, 2025
@dotnet-policy-service dotnet-policy-service bot added the community-contribution Indicates that the PR has been added by a community member label Sep 26, 2025
@afifi-ins afifi-ins force-pushed the DispatchProxyGeneraotor branch from f77dbf4 to eb9aeaf Compare September 26, 2025 20:56
@jkotas jkotas added area-System.Reflection and removed needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners labels Sep 26, 2025
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teo-tsirpanis
teo-tsirpanis reviewed Sep 27, 2025
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@afifi-ins afifi-ins force-pushed the DispatchProxyGeneraotor branch from eb9aeaf to 8423f21 Compare September 29, 2025 05:02
@afifi-ins afifi-ins closed this Sep 29, 2025
@afifi-ins afifi-ins deleted the DispatchProxyGeneraotor branch September 29, 2025 16:55
@afifi-ins afifi-ins restored the DispatchProxyGeneraotor branch September 29, 2025 16:56
@afifi-ins afifi-ins reopened this Sep 29, 2025
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@jkotas jkotas mentioned this pull request Sep 30, 2025
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DispatchProxy generates a proxy type implementing the interface from the wrong ALC

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