这段c#代码用vb怎么写

Question

byte[] buf = new byte[1280]; // for (int idx = 0; idx < len; idx++) str += Convert.ToString(Convert.ToChar(buf[idx]));

Answer 1

 dim buf(1279)as byte
    for idx=0 to len-1
      str= str & System.Convert.ToString(System.Convert.ToChar(buf(idx)))
    next