定義string變數為str,記憶體流變數為ms,位元陣列為bt

      1.字串轉位元陣列

(1)byte[] bt=System.Text.Encoding.Default.GetBytes("字串");

(2)byte[] bt=Convert.FromBase64String("字串");

2.字串轉流

(1)MemoryStream ms=new MemoryStream(System.Text.Encoding.Default.GetBytes("字串"));

(2)MemoryStream ms=new MemoryStream(Convert.FromBase64String("字串"));

3.流轉位元陣列

(1)byte[] bt=ms.ToArray();

(2)MemoryStream ms=new MemoryStream();ms.Write(bt,0,ms.Length);

4.流轉字串

(1)string str=Convert.ToBase64String(ms.ToArray());

(2)string str=System.Text.Encoding.Default.GetString(ms.ToArray());

5.位元陣列轉字串

(1)string str=System.Text.Encoding.Default.GetString(bt);

(2)string str=Convert.ToBase64String(bt);

6.位元陣列轉流

(1)MemoryStream ms=new MemoryStream(bt);

(2)MemoryStream ms=new MemoryStream();ms.Read(bt,0,bt.Lenght);