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分享 FileStream fs=new FileStream(@"E:\test.bin",FileMode.OpenOrCreate);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(123);
bw.Write("田中");
bw.Close();
fs.Close();

string s = "田中";
byte[] bs = Encoding.UTF8.GetBytes(s);
foreach (byte b in bs)
{
System.IO.File.AppendAllText(@"E:\test.txt", b.ToString("x2"));
}