C# Byte[]數組讀取和寫入文件

protected void ByteToString_Click(object sender, EventArgs e)
          {
  
  
              string content = this.txtContent.Text.ToString();
  
              if (string.IsNullOrEmpty(content))
              {
                  return;
             }
 
             //string 轉為byte數組
             byte[] array = Encoding.UTF8.GetBytes(content);
 
             //將byte數組轉為string
             string result = Encoding.UTF8.GetString(array);
 
 
             Response.Write(result);
 
 
         }
         //利用byte[]數組寫入文件
         protected void writerFile_Click(object sender, EventArgs e)
         {
 
             string content = this.txtContent.Text.ToString();
 
             if (string.IsNullOrEmpty(content))
             {
                 return;
             }
 
             //將string轉為byte數組
             byte[] array = Encoding.UTF8.GetBytes(content);
 
             string path = Server.MapPath("/test.txt");
             //創建一個文件流
             FileStream fs = new FileStream(path, FileMode.Create);
 
             //將byte數組寫入文件中
             fs.Write(array, 0, array.Length);
             //所有流類型都要關閉流，否則會出現內存泄露問題
             fs.Close();
 
             Response.Write("保存文件成功");
 
 
         }
         //利用byte[]數組讀取文件
         protected void readFile_Click(object sender, EventArgs e)
         {
             string path = Server.MapPath("/test.txt");
 
             FileStream fs = new FileStream(path, FileMode.Open);
 
             //獲取文件大小
             long size = fs.Length;
 
             byte[] array = new byte[size];
 
             //將文件讀到byte數組中
             fs.Read(array, 0, array.Length);
 
             fs.Close();
 
             //將byte數組轉為string
             string result = Encoding.UTF8.GetString(array);
 
 
             Response.Write(result);
 
             
 
         }