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1. SequentialGuid SequentialGuid Public

   RFC 9562 compliant UUID generation for .NET — time-ordered UUIDv7 (millisecond) and UUIDv8 (tick precision), deterministic UUIDv5/v8 name-based, and random UUIDv4, all with SQL Server sort-order su…

   C# 70 10

2. TaskTupleAwaiter TaskTupleAwaiter Public

   Await a tuple of Tasks with different return types and destructure the results in a single line — no Task.WhenAll boilerplate required

   C# 77 11

3. FizzBuzz using C# pattern matching, ... FizzBuzz using C# pattern matching, value tuples, and a switch expression

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   FizzBuzz(63).ForEach(Console.WriteLine);

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   return;

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   static List<string> FizzBuzz(int count) => [.. Enumerable

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       .Range(1, count)

4. MineSweeper.cs MineSweeper.cs

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   static int[][] Minesweeper(bool[][] matrix) => [.. matrix

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       .Select((row, i) => row

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           .Select((_, j) => matrix

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               .Skip(i - 1)

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               .Take(i == 0 ? 2 : 3)