Convert System.Collections.Tests to xUnit v3 - #134029

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agocke:copilot/xunit3-system-collections

Commits on Sep 16, 2026

Add an xUnit v3 opt-in for library tests
agocke
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578ae61
Convert System.Collections.Tests to xUnit v3
agocke
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91dbe76

Commits on Sep 17, 2026

Split xUnit v2 and v3 test infrastructure
agocke
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68367ca
Centralize the xUnit v3 test opt-in
agocke
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b49e9e2