Distinct by property of class with LINQ [duplicate]

Question

I have a collection:

List<Car> cars = new List<Car>(); 

Cars are uniquely identified by their property CarCode.

I have three cars in the collection, and two with identical CarCodes.

How can I use LINQ to convert this collection to Cars with unique CarCodes?

Answer 1

You can use grouping, and get the first car from each group:

List<Car> distinct =   cars   .GroupBy(car => car.CarCode)   .Select(g => g.First())   .ToList();