// Prevent cell editing
sheet.BeforeCellEdit += (s, e) => e.IsCancelled = true;

// Prevent outline collapse
sheet.BeforeOutlineCollapse += (s, e) => e.IsCancelled = true;

// Prevent selection change
sheet.BeforeSelectionRangeChange += (s, e) => e.IsCancelled = true;

var editableRange = new RangePosition(3, 1, 2, 3);

sheet.SetRangeBorders(editableRange, BorderPositions.Outside, RangeBorderStyle.BlackSolid);
sheet[2, 1] = "Edit only allowed in this range:";

sheet.BeforeCellEdit += (s, e) =>
    e.IsCancelled = !editableRange.Contains(e.Cell.Position);

sheet.CellDataChanged += (s, e) =>
{
    Console.WriteLine($"Cell {e.Cell.Address} changed to: {e.Cell.Data}");
};

sheet.RangeDataChanged += (s, e) =>
{
    Console.WriteLine($"Range {e.Range.ToAddress()} data changed");
};

sheet.BeforeCellKeyDown += (s, e) =>
{
    if (e.KeyCode == KeyCode.Enter)
    {
        e.IsCancelled = true;
        // Custom navigation
        sheet.SelectRange(sheet.SelectionRange.Row + 1, 0, 1, 1);
    }
};