C＃ - 如何对通用列表的值求和？

Question

我想获得public T getItem(int position) { return mObjects.get(position); // mObjects references same ArrayList as users } 字段的总和。

users.get(position)

Answer 1

以下是一些使用System.Linq;

的实例

void Main()
{
    List<int> numbers = Enumerable.Range(1,100).ToList();
    var result = numbers.Sum();
    Console.WriteLine(result); // Prints 5050
    List<SomeType> customTypeList = Enumerable.Range(1, 100).Select(x => new SomeType { SomeVal = x}).ToList();
    var customResult = customTypeList.Sum(n => n.SomeVal);
    Console.WriteLine(result); // Prints 5050
}

public class SomeType
{
    public int SomeVal { get; set;}
}