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[C# 15-Errors and warnings]: New Feature - unions #52321

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#52860
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[C# 15-Errors and warnings]: New Feature - unions#52321
#52860
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BillWagner
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🏁 Release: .NET 11Work related to .NET 11📌 seQUESTeredIdentifies that an issue has been imported into Quest.dotnet-csharp/svcokr-curationOKR: Curate content to remove outdated recommendationswhats-new/subsvc
@BillWagner

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@BillWagner
BillWagner
opened on Mar 16, 2026

.NET 11 Preview

.NET 11 Preview 3

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Errors and warnings added for this feature

See test plan at dotnet/roslyn#81074

What language theme applies, for consolidation of articles

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Associated WorkItem - 562439

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🏁 Release: .NET 11Work related to .NET 11📌 seQUESTeredIdentifies that an issue has been imported into Quest.dotnet-csharp/svcokr-curationOKR: Curate content to remove outdated recommendationswhats-new/subsvc

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dotnet/docs April 2026 sprint

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