[release/10.0] Fix DefaultIfEmptyIterator.TryGetElementAt returning default value for out-of-bounds indices #119845
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…ment not found Co-authored-by: eiriktsarpalis <2813363+eiriktsarpalis@users.noreply.github.com>
…tElementAt Co-authored-by: eiriktsarpalis <2813363+eiriktsarpalis@users.noreply.github.com>
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/ba-g Known test errors only |
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Backport of #119838 to release/10.0
/cc @eiriktsarpalis @copilot
Customer Impact
.NET 9 regressed the behavior of the
DefaultIfEmptyLINQ method resulting in incorrect results when chained withElementAtOrDefaultusing an out of bounds index.Regression
#98969
Testing
Added unit testing verifying the impacted behavior.
Risk
Low. Applies a straightforward fix to a simple bug.