public static ByteArray ToByteArray(string str)
{
if (!IsUid(str))
return null;
str = str.Replace("-", "");
var ret = new ByteArray();
for (int i = 0; i < str.Length; i += 2)
{
byte num;
if (!byte.TryParse(str.Substring(i, 2), NumberStyles.HexNumber, null, out num))
return null;
ret.WriteByte(num);
}
ret.Position = 0;
return ret;
}
