Skip to content

Clarify event handler invocation order and return in managed assembly loading algorithm #55110

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Copilot wants to merge 3 commits into
base: main
Choose a base branch
from
+2 −2
Open

Clarify event handler invocation order and return in managed assembly loading algorithm #55110

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
525127e
doc: explain Assembly.LoadFrom AssemblyResolve handler ordering behavior
Copilot Jul 27, 2026
39653e0
doc: move handler-ordering info into algorithm section
Copilot Jul 28, 2026
27b4a7b
doc: drop redundant LoadFrom note from AssemblyResolve bullet
Copilot Jul 28, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions docs/core/dependency-loading/loading-managed.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,8 +49,8 @@ The following algorithm describes how the runtime loads a managed assembly.
- Check its `cache-by-name`.
- Call the <xref:System.Runtime.Loader.AssemblyLoadContext.Load*?displayProperty=nameWithType> function.
- Check the <xref:System.Runtime.Loader.AssemblyLoadContext.Default?displayProperty=nameWithType> instance's cache and run [managed assembly default probing](default-probing.md#managed-assembly-default-probing) logic. If an assembly is newly loaded, a reference is added to the <xref:System.Runtime.Loader.AssemblyLoadContext.Default?displayProperty=nameWithType> instance's `cache-by-name`.
- Raise the <xref:System.Runtime.Loader.AssemblyLoadContext.Resolving?displayProperty=nameWithType> event for the active AssemblyLoadContext.
- Raise the <xref:System.AppDomain.AssemblyResolve?displayProperty=nameWithType> event.
- Raise the <xref:System.Runtime.Loader.AssemblyLoadContext.Resolving?displayProperty=nameWithType> event for the active AssemblyLoadContext. Handlers are invoked in registration order. The first handler that returns a non-null assembly ends the resolution.
- Raise the <xref:System.AppDomain.AssemblyResolve?displayProperty=nameWithType> event. Handlers are invoked in registration order. The first handler that returns a non-null assembly ends the resolution.

3. For the other types of loads, the `active` <xref:System.Runtime.Loader.AssemblyLoadContext> loads the assembly in the following priority order:

Expand Down
Loading