从Ilist获取IDictionary

internal class Program
{
    private static void Main(string[] args)
    {
        IList<Person> list = new List<Person> {new Person("Bob", 40), new Person("Jill", 35)};
        IDictionary<string, Person> dictionary = list.ToDictionary(x => x.Name);
    }
}

public class Person
{
    private readonly int _age;
    private readonly string _name;

    public Person(string name, int age)
    {
        _name = name;
        _age = age;
    }

    public int Age
    {
        get { return _age; }
    }

    public string Name
    {
        get { return _name; }
    }
}

IDictionary<string, int> dictionary2 = list.ToDictionary(x => x.Name, x => x.Age);

列表有一个组件,字典有两个组件。你不能简单地转换它们。

如果你想让你的字典 <int, object> ,在哪里 int

Dictionary<int, object> dict = new Dictionary<int, object>();
myList.ForEach(i => dict.Add(myList.IndexOf(i), i)); // Linq magic!

object 使用列表类型,并确保 using System.Linq; .

或使用 ToDictionary()