为啥转换后数值变了呢？？？？

Question

                int _DataSize = Marshal.SizeOf(typeof(StatisticalData));
                IntPtr _DataIntPtr = Marshal.AllocHGlobal(_DataSize);
                Marshal.Copy(buff, _ClientHeadSize, _DataIntPtr, _DataSize);
                StatisticalData _CStatDataOBject = (StatisticalData)Marshal.PtrToStructure(_DataIntPtr, typeof(StatisticalData));
                Marshal.FreeHGlobal(_DataIntPtr);
_CStatDataOBject.connectionsSoFar等于0x0000000100000001
但是在buff里面看到的确是1啊，为啥变了呢

Answer 1

定位问题，ClientHeadSize可能不对using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            byte[] buff = new byte[17];
            int _ClientHeadSize = 1;            buff[0] = (byte)'!';            buff[1] = (byte)'H';
            buff[2] = (byte)'E';
            buff[3] = (byte)'A';
            buff[4] = (byte)'D';            buff[5] = 0x12;            buff[6] = (byte)'O';
            buff[7] = (byte)'T';
            buff[8] = (byte)'H';
            buff[9] = (byte)'E';
            buff[10] = (byte)'R';
            buff[11] = (byte)'S';            int _DataSize = Marshal.SizeOf(typeof(StatisticalData));
            IntPtr _DataIntPtr = Marshal.AllocHGlobal(_DataSize);
            Marshal.Copy(buff, _ClientHeadSize, _DataIntPtr, _DataSize);
            StatisticalData _CStatDataOBject = (StatisticalData)Marshal.PtrToStructure(_DataIntPtr, typeof(StatisticalData));
            Marshal.FreeHGlobal(_DataIntPtr);            MessageBox.Show(new String(_CStatDataOBject.Other1)); // HEAD
            MessageBox.Show("0x" + _CStatDataOBject.B.ToString("x")); // 0x12
            MessageBox.Show(new String(_CStatDataOBject.Other2)); // OTHERS
        }        [StructLayout(LayoutKind.Sequential)]
        struct StatisticalData
        {
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
            public Char[] Other1;            [MarshalAs(UnmanagedType.I1)]
            public byte B;            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
            public Char[] Other2;
        }
    }
}