c#结构体和字节数组的转换、字节数组和stream的转换

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.IO;
using System.Runtime.InteropServices;

class Converter {
    public static Byte[] StructToBytes(Object structure) {
        Int32 size = Marshal.SizeOf(structure);
        IntPtr buffer = Marshal.AllocHGlobal(size);
        try {
            Marshal.StructureToPtr(structure, buffer, false);
            Byte[] bytes = new Byte[size];
            Marshal.Copy(buffer, bytes, 0, size);
            return bytes;
        }
        finally {
            Marshal.FreeHGlobal(buffer);
        }
    }
    public static Object BytesToStruct(Byte[] bytes, Type strcutType) {
        Int32 size = Marshal.SizeOf(strcutType);
        IntPtr buffer = Marshal.AllocHGlobal(size);
        try {
            Marshal.Copy(bytes, 0, buffer, size);
            return Marshal.PtrToStructure(buffer, strcutType);
        }
        finally {
            Marshal.FreeHGlobal(buffer);
        }
    }

    public static byte[] StreamToBytes(Stream stream) {
        byte[] bytes = new byte[stream.Length];
        stream.Read(bytes, 0, bytes.Length);
        // 设置当前流的位置为流的开始
        stream.Seek(0, SeekOrigin.Begin);
        return bytes;
    }

    public static Stream BytesToStream(byte[] bytes) {
        Stream stream = new MemoryStream(bytes);
        return stream;
    }
}

MyStruct pack = new MyStruct();
pack = (MyStruct)Converter.BytesToStruct(Converter.StreamToBytes(stream), pack.GetType());