[5.1] Preserve distributed transactions on pooled connection reset#3112

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mdaigle wants to merge 3 commits intorelease/5.1from

dev/mdaigle/fix-dtc-5.1

Commits on Jan 15, 2025

Preserve distributed transactions on pooled connection reset (#3019)
mdaigle
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Commits on Jul 15, 2025

Merge branch 'release/5.1' of github.com:dotnet/SqlClient into fix-dtc-5.1
mdaigle
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Commits on Jul 23, 2025

Use appropriate DataTestUtility method to check distributed transaction support.
mdaigle
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