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docs: add SubsystemVersion 4.00→6.00 retargeting change for .NET 4.5#54121

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docs: add SubsystemVersion 4.00→6.00 retargeting change for .NET 4.5#54121
heissenberg06 wants to merge 3 commits into
dotnet:mainfrom
heissenberg06:fix/subsystemversion-retargeting-docs

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@heissenberg06 heissenberg06 commented Jun 2, 2026

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Summary

Documents the default SubsystemVersion change from 4.00 to 6.00 introduced in .NET Framework 4.5, its potential impact on WinForms layout via SystemInformation/GetSystemMetrics, and the workaround.

Fixes #54087


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docs/core/extensions/options.md Options pattern in .NET
docs/framework/migration-guide/retargeting/4.5.x.md Retargeting changes for migration to .NET Framework 4.5.x

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heissenberg06 requested review from a team and gewarren as code owners June 2, 2026 13:00
@dotnetrepoman dotnetrepoman Bot added this to the June 2026 milestone Jun 2, 2026
@heissenberg06
heissenberg06 deleted the fix/subsystemversion-retargeting-docs branch June 9, 2026 09:21
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Missing docs: SubsystemVersion changed to 6.00 starting with .NET 4.5

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