private string ConvertTag(string tag)
{
if (mappingDict == null)
{
var array = mappingTable.Split(new string[] {"\r\n"}, StringSplitOptions.RemoveEmptyEntries);
mappingDict=new Dictionary<string, string>();
foreach (string s in array)
{
var kv = s.Split('\t');
mappingDict.Add(kv[0],kv[1]);
}
}
return mappingDict[tag];
}