Скачать или смотреть ToLower is Killing your App Performance!

Lowercasing strings to compare them costs allocations and can break under different cultures (hello, Turkish I). In this video, Michael shows why .ToLower()/.ToUpper() are the wrong tools for comparisons and how StringComparison and StringComparer give you fast, correct behavior. We’ll cover Contains/StartsWith/EndsWith overloads, collection comparers, EF Core caveats, and SQL Server collations. Plus, a tiny benchmark to visualize the allocation difference.

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