private void AddAll(string tree)
{
XDocument table = Resources.CharTable;
foreach(XElement elem in table.Root.Element(tree).Elements("pair"))
{
char ch = elem.Attribute("char").Value[0];
byte b = Byte.Parse(elem.Attribute("code").Value);
if(elem.Attribute("nochar")==null)
c2b[ch] = b;
if(elem.Attribute("nocode")==null)
b2c[b] = ch;
}
}