public Flatfile(string filename = "", string tablename = "", string delimiter = Globals.Delimiter, string quoter = Globals.Quote, bool hasHeader = true, string[] headers = null, SchemaFile schema = null)
{
Filename = filename;
Tablename = tablename;
Delimiter = delimiter;
Quoter = quoter;
HasHeaderRow = hasHeader;
Headers = headers;
Schemafile = schema;
}