public MainWindow() { InitializeComponent(); _xlMergeManager = new ExcelStyleMergeManager(_flex); _flex.MergeManager = _xlMergeManager; _flex.AllowMerging = AllowMerging.Cells; for (int r = 0; r < 50; r++) { _flex.Rows.Add(new Row()); } for (int c = 0; c < 10; c++) { _flex.Columns.Add(new Column()); } for (int r = 0; r < _flex.Rows.Count; r++) { for (int c = 0; c < _flex.Columns.Count; c++) { _flex[r, c] = string.Format("r{0}, c{1}", r, c); } } }