[Code Optimization] Memory issue in Enumerable.ToList

[CarlosCampos06]

Description: A lot of CPU or Memory is being spent in IEnumerable<T>.ToList().

Current condition: 68.3734377722759 of your Memory was spent in Enumerable.ToList called from Store.Reviews.ReviewValidation.StringValidation. We expected this value to be <13%.

Recommendations: Consider using List<T> from the start to avoid expensive calls to ToList(). Also, verify that IEnumerable<T>.ToList() isn't being...

Instructions for performance issue

Fix the perf issue by changing only non-test files.
Steps:

1. Review repo, understand structure.
2. Create Benchmark Tests - Use BenchmarkDotNet + MemoryDiagnoser. Create .csproj, run with latest .NET.
3. Fix & optimize problematic method, cover edge cases.
4. Rerun benchmark + unit tests to verify perf and correctness.
5. In PR Explain fix - what you considered, implemented, and why.
6. Post performance results as table in PR comment before/after fix. Add a short description of code changes into PR.
7. Rename PR – Format: 'method