unsafe关键字

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;
using System.Dynamic;
using System.ComponentModel;
using System.Diagnostics;

namespace ConsoleApplication
{
    public struct MyStruct
    {
        public int a;
        public int b;
    }


    class Program
    {
        static unsafe void Main(string[] args)
        {
            MyStruct ms = new MyStruct();
            //获取MyStruct的首地址
            Console.WriteLine((uint)&ms);
            //获取值类型的大小
            Console.WriteLine(sizeof(MyStruct));
            //在堆栈上分配内存空间
            int* p = stackalloc int[10];
            *p = 100;
            Console.WriteLine("*p={0}", *p);
            Console.ReadLine();
        }

    }
}

C#编译器提供了/unsafe开关来控制是否允许对unsafe关键字的代码进行编译