How to use LINQ to find the most common first letter of employee?

Short answer: How to use LINQ to find the most common first letter of employee names? var mostCommonLetter = employees .GroupBy(e => e.Name[0]) .OrderByDescending(g => g.Count()) .FirstOrDefault()?.Key; Console.WriteLine($"Most common first letter: {mostCommonLetter}"); Follow : How to use LINQ to find the most common first letter of employee names?

Real-world example (ShopNest)

ShopNest uses LINQ to query orders: filter by date, project to a summary DTO, and order by total—readable C# that becomes SQL under EF Core.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.