private void DrawLines() { Graphics gfx = ResultBox.CreateGraphics(); for (int i = 1; i <= ColumnsInput.Value; i++) { gfx.DrawLine(Pens.Black, (float)(ResultBox.Left + (i * ResultBox.Width / ColumnsInput.Value)), ResultBox.Bottom, (float)(ResultBox.Left + (i * ResultBox.Width / ColumnsInput.Value)), ResultBox.Top); } }