修改TPL foreach循环中的类变量

using System;
using System.Collections.Generic;
using System.Threading.Tasks;

public class MyClass
{
    public int Value { get; set; }
}

public class Program
{
    public static void Main()
    {
        List<MyClass> myList = new List<MyClass>
        {
            new MyClass { Value = 1 },
            new MyClass { Value = 2 },
            new MyClass { Value = 3 }
        };

        Parallel.ForEach(myList, item =>
        {
            // 修改类变量的值
            item.Value *= 2;

            // 修改类变量的属性
            item.Value = Math.Pow(item.Value, 2);

            // 调用类变量的方法
            item.SomeMethod();
        });

        foreach (var item in myList)
        {
            Console.WriteLine(item.Value);
        }
    }
}