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docs: document FileNotFoundException passthrough behavior in AssemblyLoadContext resolution chain #12419

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elinor-fung merged 2 commits into from
Mar 19, 2026
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docs: document FileNotFoundException passthrough behavior in AssemblyLoadContext resolution chain #12419

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docs: document FileNotFoundException passthrough in AssemblyLoadConte…
Copilot Mar 18, 2026
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revert: restore original wording for LoadFromAssemblyName resolution …
Copilot Mar 18, 2026
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6 changes: 6 additions & 0 deletions xml/System.Runtime.Loader/AssemblyLoadContext.xml
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Expand Up @@ -586,6 +586,9 @@ Implementations of this method can return an assembly loaded into any <xref:Syst
> [!IMPORTANT]
> To prevent recursive stack overflow, do not call this instance's <xref:System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(System.Reflection.AssemblyName)> method from this method.

> [!NOTE]
> If this method throws a <xref:System.IO.FileNotFoundException>, the resolution process continues. The <xref:System.Runtime.Loader.AssemblyLoadContext.Resolving> event and the <xref:System.AppDomain.AssemblyResolve> event are still fired. Any other exception stops the resolution process immediately.
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]]></format>
</remarks>
<related type="Article" href="/dotnet/core/dependency-loading/loading-managed">Managed assembly loading algorithm</related>
Expand Down Expand Up @@ -1108,6 +1111,9 @@ The OS handle returned by this method can be used with methods of the <xref:Syst
> [!IMPORTANT]
> If more than one event handler is registered for this event, the event handlers are called in order until an event handler returns a value that isn't `null`. Subsequent event handlers are ignored.

> [!NOTE]
> If an event handler throws a <xref:System.IO.FileNotFoundException>, the <xref:System.AppDomain.AssemblyResolve> event is still fired. This gives other extension points a chance to resolve the assembly. Any other exception stops the resolution process immediately and isn't propagated to other handlers.
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For more information about handling events, see [Handle and raise events](/dotnet/standard/events/).

It is noteworthy that a handler can be added for this event on any <xref:System.Runtime.Loader.AssemblyLoadContext>, including the default context.
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