check_item createCheckItem(string s, int i) {
check_item res = new check_item();
res.correct = s.IndexOf('+') > 0;
if (res.correct) s = s.Trim('+');
//if (s.Length != 1) throw new Exception(string.Format("Only single letter in cell alowed {0}", ErrorId));
res.title = string.Format(" {0} ", s);
res.varNameLow = varName + i.ToString();
return res;
}
public selection_item(check_item item) {
this.item = item;
}