与LINQ的类属性不同 [英] Distinct by property of class with LINQ

问题描述

我有一个收藏集:

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

汽车通过其属性CarCode进行唯一标识.

Cars are uniquely identified by their property CarCode.

我收藏了三辆汽车，其中两辆具有相同的CarCode.

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

如何使用LINQ将此集合转换为具有唯一CarCodes的Cars?

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

推荐答案

您可以使用分组，并从每个组中获得第一辆车:

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();

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