How to perform intersection of two collections?

Short answer: How to perform intersection of two collections?

Explain a bit more

var intersect = list1.Intersect(list2); foreach (var name in intersect) Console.WriteLine(name); // Output: Bob How to perform intersection of two collections? var intersect = list1.Intersect(list2); foreach (var name in intersect) Console.WriteLine(name); // Output: Bob How to perform intersection of two collections? var intersect = list1.Intersect(list2); foreach (var name in intersect) Console.WriteLine(name); // Output: Bob How to perform intersection of two collections? var intersect = list1.Intersect(list2); foreach (var name in intersect) Console.WriteLine(name); // Output: Bob

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.