Use this skill before answering or editing whenever an MSTest v1/v2 project is being upgraded or repaired for v3.
Upgrades & Migration .NET Skills
Runtime and test migration flows kept separate from active development bundles.
Upgrades & Migration skills
Browse every catalog entry grouped under Upgrades & Migration. These cards link to dedicated skill pages and still support quick-view popups.
Use this skill before answering, planning, or editing any MSTest 3.x-to-4.x upgrade or post-upgrade failure.
Use this skill before answering, planning, or editing whenever .NET tests or CI are switching from VSTest to Microsoft.Testing.Platform (MTP), or an MTP migration behaves…
Convert .NET tests from xUnit.net v2/v3 to MSTest v4 while preserving VSTest or MTP.
Migrate .NET test projects from xUnit.net v2 to xunit.v3 and fix v3 breaks.
Make .NET projects compatible with Native AOT and trimming by systematically resolving IL trim/AOT analyzer warnings.
Migrate a .NET 10 project or solution to .NET 11 and resolve all breaking changes.
Migrate a .NET 8 project to .NET 9 and resolve all breaking changes.
Migrate a .NET 9 project or solution to .NET 10 and resolve all breaking changes.
Enable nullable reference types in a C# project and systematically resolve all warnings.
Guides migration of .NET Framework Thread.Abort usage to cooperative cancellation in modern .NET.
ALWAYS USE when asked to migrate, replace, or make testable existing C# static calls with a named wrapper or built-in abstraction: DateTime.UtcNow/Now or DateTimeOffset.UtcNow to…
Set up or recover MTP hot reload for a long-lived edit/re-run loop.
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