C#文件和字節流的轉換方法

1、讀取文件，並轉換為字節流
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、將字節流寫入文件
FileStream fs = new FileStream("D:\inf.dlv",FileMode.Create,FileAccess.Write);
fs.Write(infbytes, 0, inf.Length);
fs.Close();

　　

3.將字節流轉換成文件流
Stream stream = new MemoryStream(bytes); 
return stream;