feat: .NET 11#339
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Prerequisite for adopting C# union types (discriminated unions), which ship as a preview language feature in .NET 11.
Converts every OneOf<T0,...>/OneOf.Types usage to C# union declarations (union keyword, LangVersion=preview), the structural-union language feature shipped in .NET 11 Preview 2. - Common/Results/Unions.cs: generic Union2<T0,T1>..Union8<..> declarations replacing OneOf<T0,...T7>. - Common/Results/CommonResultCases.cs: Success, Success<T>, NotFound, Error, Error<T>, None replacing OneOf.Types. - Rewrote every .Match/.Switch/.TryPickTx/.AsTx/.IsTx call site to switch expressions/statements and `is` patterns, since union declarations only expose a Value property plus constructors (no generated helper methods). - Removed the OneOf package reference from Common.csproj and Directory.Packages.props. Note: OpenShock.Common.Results.NotFound/Unauthorized share a name with inherited ControllerBase.NotFound()/.Unauthorized() methods, so a few controller files alias the namespace (`using Results = ...`) to disambiguate bare switch-pattern usage.
Enables the runtime-async feature switch solution-wide so async methods suspend/resume via the runtime instead of compiler-generated state machines: cleaner stack traces, better debuggability, lower overhead. No source changes needed - this only affects codegen.
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Ready to review this PR? Stage has broken it down into 7 individual chapters for you: 
Chapters generated by Stage for commit e317cb6 on Jul 27, 2026 11:59am UTC. |
The generic mcr.microsoft.com/dotnet/sdk:11.0-alpine tag doesn't exist yet since .NET 11 is still preview; MCR only publishes preview-qualified tags. Also the runtime stages were still on dotnet/aspnet:10.0-alpine while the apps target net11.0, a mismatch that builds but crashes at container startup. Also fix .dockerignore's dev/ pattern to Dev/ to match the actual (case-sensitive) directory name, so local Postgres data doesn't leak into the build context.
# Conflicts: # .github/workflows/ci-build.yml # API/Services/Account/AccountService.cs # Directory.Packages.props
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Pull request overview
Upgrades the solution to .NET 11 (preview) and replaces the OneOf dependency with new C# union types + shared result case types, updating call sites across API, Common, Cron, and LiveControlGateway. Also updates Docker images and CI/workflows to build against .NET 11.
Changes:
- Migrate
OneOf<T...>usages toUnionN<T...>and introduce shared result case types (Success,NotFound,Error, etc.). - Update solution-wide target framework to
net11.0, enable C#preview, and pin .NET 11 preview SDK/container images. - Refresh CI/workflows and Dockerfiles to use .NET 11.
Reviewed changes
Copilot reviewed 67 out of 67 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| LiveControlGateway/Websocket/FlatbufferWebSocketUtils.cs | Switch flatbuffer receive helper from OneOf to Union3. |
| LiveControlGateway/Websocket/FlatbuffersWebsocketBaseController.cs | Replace OneOf.Match receive handling with switch over Union3. |
| LiveControlGateway/LifetimeManager/HubLifetimeManager.cs | Update lifetime manager APIs to Union2/Union3 and adjust marker docs. |
| LiveControlGateway/LifetimeManager/HubLifetime.cs | Convert key methods to Union2/Union3 return types. |
| LiveControlGateway/Controllers/LiveControlController.cs | Replace OneOf patterns with union switches/pattern matching in websocket flow. |
| LiveControlGateway/Controllers/HubControllerBase.cs | Update connection precondition result type + switch handling for union cases. |
| global.json | Pin repo SDK to .NET 11 preview and allow prerelease resolution. |
| docker/LiveControlGateway.Dockerfile | Update runtime base image to .NET 11 preview (alpine3.24). |
| docker/Cron.Dockerfile | Update runtime base image to .NET 11 preview (alpine3.24). |
| docker/Base.Dockerfile | Update SDK build stage image to .NET 11 preview (alpine3.24). |
| docker/API.Dockerfile | Update runtime base image to .NET 11 preview (alpine3.24). |
| Directory.Packages.props | Remove OneOf, bump key packages, and add a scoped crypto XML patch reference. |
| Directory.Build.props | Target net11.0, enable C# preview, and enable runtime-native async feature. |
| Cron/Services/Email/EmailTemplate.cs | Convert parsing helpers to Union2 and update callers. |
| Common/Websocket/WebsockBaseController.cs | Update websocket precondition to Union2 and adjust handling. |
| Common/Validation/UsernameValidator.cs | Change validator result to Union2<Success, UsernameError>. |
| Common/Utils/JsonWebSocketUtils.cs | Change receive helper return type to Union3. |
| Common/Services/Webhook/WebhookService.cs | Update service API to Union2/Union4. |
| Common/Services/Webhook/IWebhookService.cs | Update interface return types to Union2/Union4. |
| Common/Services/IControlSender.cs | Update control sender interface return type to Union4. |
| Common/Services/ControlSender.cs | Update implementation to Union4. |
| Common/Services/Configuration/IConfigurationService.cs | Replace OneOf with Union3/Union4 across configuration API. |
| Common/Services/Configuration/ConfigurationService.cs | Update implementation signatures/returns to unions. |
| Common/Results/Unions.cs | Add Union2..Union8 type declarations (structural unions). |
| Common/Results/CommonResultCases.cs | Add shared union case types (Success/NotFound/Error/None). |
| Common/Hubs/UserHub.cs | Replace TryPickT* with pattern matching on union auth reference. |
| Common/Hubs/PublicShareHub.cs | Replace TryPickT* with pattern matching on union auth reference. |
| Common/DataAnnotations/UsernameAttribute.cs | Update attribute validation handling to switch over union result. |
| Common/Common.csproj | Remove OneOf package reference. |
| Common/Authentication/Services/UserReferenceService.cs | Change AuthReference to Union3<LoginSession, ApiToken, None>. |
| Common/Authentication/ControllerBase/AuthenticatedSessionControllerBase.cs | Replace Match with union switch for permission evaluation. |
| Common/Authentication/Attributes/TokenPermissionAttribute.cs | Replace Match with union switch for auth validation. |
| Common.Tests/Validation/UsernameValidatorTests.cs | Update tests to assert union cases via pattern matching. |
| API/Services/Turnstile/ICloudflareTurnstileService.cs | Update turnstile service contract to Union2. |
| API/Services/Turnstile/CloudflareTurnstileService.cs | Update implementation signature to Union2. |
| API/Services/Account/IAccountService.cs | Replace OneOf with UnionN across account service contract. |
| API/Services/Account/AccountService.cs | Update implementation to return/use union types. |
| API/Controller/Tokens/ReportTokens.cs | Update turnstile result handling to union pattern matching. |
| API/Controller/Tokens/GetTokenSelf.cs | Replace TryPickT* with pattern matching for token extraction. |
| API/Controller/Shockers/SendControl.cs | Replace Match with union switch for control responses. |
| API/Controller/Sessions/SessionSelf.cs | Replace TryPickT* with pattern matching for session extraction. |
| API/Controller/OAuth/SignupGetData.cs | Convert OAuth flow validation to Union2 and update handling. |
| API/Controller/OAuth/SignupFinalize.cs | Convert OAuth flow validation + create-account result handling to unions. |
| API/Controller/OAuth/HandOff.cs | Convert OAuth flow validation handling to unions. |
| API/Controller/OAuth/_ApiController.cs | Replace OAuth validation return type with Union2. |
| API/Controller/Devices/DevicesController.cs | Replace gateway resolve result with Union2 and update call sites. |
| API/Controller/Admin/WebhookAdd.cs | Replace Match with union switch expression. |
| API/Controller/Admin/ReactivateUser.cs | Replace Match with union switch and disambiguate case types. |
| API/Controller/Admin/DeleteUser.cs | Replace Match with union switch and disambiguate case types. |
| API/Controller/Admin/DeactivateUser.cs | Replace Match with union switch and disambiguate case types. |
| API/Controller/Admin/Configuration.cs | Replace Match with union switch expressions for config endpoints. |
| API/Controller/Account/VerifyEmail.cs | Replace Match with union switch expression for verify result. |
| API/Controller/Account/SignupV2.cs | Replace Match with union switch expression for account creation. |
| API/Controller/Account/PasswordResetComplete.cs | Replace Match with union switch expression for reset completion. |
| API/Controller/Account/PasswordResetCheckValid.cs | Replace Match with union switch expression for reset validity check. |
| API/Controller/Account/LoginV2.cs | Replace Match with union switch expression for credential errors. |
| API/Controller/Account/CheckUsername.cs | Replace Match with union switch expression for username availability. |
| API/Controller/Account/Authenticated/Deactivate.cs | Replace Match with union switch expression for deactivation result. |
| API/Controller/Account/Authenticated/ChangeUsername.cs | Replace Match with union switch expression for username change result. |
| API/Controller/Account/Authenticated/ChangePassword.cs | Replace Match with union switch expression for password change result. |
| API/Controller/Account/Authenticated/ChangeEmail.cs | Replace Match with union switch expression for email change result. |
| API/Controller/Account/_Turnstile.cs | Update turnstile result handling to union pattern matching. |
| .github/workflows/update-cloudflare-proxies.yml | Add DOTNET_VERSION env and reorder workflow name block. |
| .github/workflows/codeql.yml | Update DOTNET_VERSION for CodeQL build. |
| .github/workflows/ci-tag.yml | Update DOTNET_VERSION to .NET 11. |
| .github/workflows/ci-build.yml | Update DOTNET_VERSION to .NET 11. |
| .dockerignore | Update ignored dev directory casing. |
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