c#中读取二进制结构体文件

文件结构体中有 ：
unsigned short int Size;
char ID;
char Type;
short int IDS;
unsigned short int Date;


采用二进制文件方式一个字节一个字节读，看看这样成不成

///

/// 读取二进制文件
///

/// 文件名
public void ReadMyBinaryFile(string fileName)
{
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
/*
* public unsafe struct DATAPACKET
{
public fixed ushort head[6];
public ushort Size;
public byte ID;
public byte Type;
public short IDS;
public ushort Date;
}
*/
int iFileLength = fileStream.Length;//文件长度
int iStructLength = 20;//结构体的字节长度
int iTimes = iFileLength / iStructLength;//共有多少个字节

DATAPACKET tmp;
byte[] byTmp = new byte[2];

for (int i = 0; i < iTimes; i++)
{
//读头部六个短整型字节
for (int j = 0; j < 6; j++)
{
if (fileStream.Read(byTmp, 0, 2) != 2)
{
Console.WriteLine("file read error!");
return;
}
tmp.head[j] = BitConverter.ToUInt16(byTmp, 0);
}
//读大小
if (fileStream.Read(byTmp, 0, 2) != 2)
{
Console.WriteLine("file read error!");
return;
}
tmp.Size= BitConverter.ToUInt16(byTmp, 0);
//读id
tmp.ID = fileStream.ReadByte();
//读类型
tmp.Type = fileStream.ReadByte();
//读ids
if (fileStream.Read(byTmp, 0, 2) != 2)
{
Console.WriteLine("file read error!");
return;
}
tmp.IDS = BitConverter.ToInt16(byTmp, 0);
//读日期
if (fileStream.Read(byTmp, 0, 2) != 2)
{
Console.WriteLine("file read error!");
return;
}
tmp.Date = BitConverter.ToUInt16(byTmp, 0);
/*
.........对读出变量进行处理
*/

}
/*
.....后续处理
*/
fileStream.Close();

}