C#文件和字节流的转换方法

1、读取文件，并转换为字节流
FileStream fs = new FileStream(filename,FileMode.Open,FileAccess.Read);
byte[] infbytes = new byte[(int)fs.Length];
fs.Read(infbytes, 0, infbytes.Length);
fs.Close();
return infbytes;

2、将字节流写入文件
FileStream fs = new FileStream("D:\inf.dlv",FileMode.Create,FileAccess.Write);
fs.Write(infbytes, 0, inf.Length);
fs.Close();

　　

3.将字节流转换成文件流
Stream stream = new MemoryStream(bytes); 
return stream;