在C#中的类中实现索引"operator"

public class MyClass
{
    private int[] _array = new int[10];

    public int this[int index]
    {
        get
        {
            if (index < 0 || index >= _array.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(index));
            }
            return _array[index];
        }
        set
        {
            if (index < 0 || index >= _array.Length)
            {
                throw new ArgumentOutOfRangeException(nameof(index));
            }
            _array[index] = value;
        }
    }
}

MyClass obj = new MyClass();
int value = obj[3]; // 获取索引3的值
obj[5] = 42; // 设置索引5的值为42