C#中实现类型对foreach的支持

代码实现：

首先创建用来遍历的类

class Car
{
    public string name;

    public int age;
}

public class Cars: IEnumerable
{
    Car[] acrArr = new Car[4];

    public Cars()
    {
        acrArr[0] = new Car() { name = "1", age = 10 };
        acrArr[1] = new Car() { name = "2", age = 20 };
        acrArr[2] = new Car() { name = "3", age = 30 };
        acrArr[3] = new Car() { name = "4", age = 40 };
    }
    public IEnumerator GetEnumerator()
    {
        return this.acrArr.GetEnumerator();
    }
}

然后直接调用foreach

foreach (Car ccc in new Cars())
{
    console.writeLine(ccc.age.ToString() + "\r\n");
}

参考文章：

文章1

文章2