How to get distinct by multiple properties?

Short answer: How to get distinct by multiple properties?

Explain a bit more

var distinctByDeptAndSalary = employees .GroupBy(e => new { e.Department, e.Salary }) .Select(g => g.First()); How to get distinct by multiple properties? var distinctByDeptAndSalary = employees .GroupBy(e => new { e.Department, e.Salary }) .Select(g => g.First()); How to get distinct by multiple properties? var distinctByDeptAndSalary = employees .GroupBy(e => new { e.Department, e.Salary }) .Select(g => g.First()); How to get distinct by multiple properties? var distinctByDeptAndSalary = employees .GroupBy(e => new { e.Department, e.Salary }) .Select(g => g.First());

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.