namespace CHCaculator { public class RowData:INotifyPropertyChanged { public string Header { get { string ret = ""; if (_RowData.Count > 3) { for(int i=0;i< _RowData.Count - 2;i++) { if (i > 0) ret += " " + _RowData[i]; else ret += _RowData[i]; } } return ret; } }