How to select a property and transform it?

Short answer: How to select a property and transform it?

Explain a bit more

var employeeEmails = employees.Select(e => e.Name.ToLower() + "@company.com"); foreach (var email in employeeEmails) Console.WriteLine(email); How to select a property and transform it? var employeeEmails = employees.Select(e => e.Name.ToLower() + "@company.com"); foreach (var email in employeeEmails) Console.WriteLine(email); How to select a property and transform it? var employeeEmails = employees.Select(e => e.Name.ToLower() + "@company.com"); foreach (var email in employeeEmails) Console.WriteLine(email); How to select a property and transform it? var employeeEmails = employees.Select(e => e.Name.ToLower() + "@company.com"); foreach (var email in employeeEmails) Console.WriteLine(email);

Real-world example (ShopNest)

ShopNest maps entities to DTOs with .Select(o => new OrderSummaryDto { Id = o.Id, Total = o.Total }) so the API does not leak internal fields.

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.