private void listView_DrawColumnHeader(object sender, DrawListViewColumnHeaderEventArgs e)
{
var startX = e.ColumnIndex == 0 ? -1 : e.Bounds.X;
var endX = e.Bounds.X + e.Bounds.Width - 1;
// Background
e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(215, 228, 242)), startX, -1, e.Bounds.Width + 1, e.Bounds.Height + 1);
// Left vertical line
e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight), startX, -1, startX, e.Bounds.Y + e.Bounds.Height + 1);
// TopCount horizontal line
e.Graphics.DrawLine(new Pen(SystemColors.ControlLightLight), startX, -1, endX, -1);
// Bottom horizontal line
e.Graphics.DrawLine(new Pen(SystemColors.ControlDark), startX, e.Bounds.Height - 1, endX, e.Bounds.Height - 1);
// Right vertical line
e.Graphics.DrawLine(new Pen(SystemColors.ControlDark), endX, -1, endX, e.Bounds.Height + 1);
var roundedFontSize = (float)Math.Round(e.Font.SizeInPoints);
var bounds = new RectangleF(e.Bounds.X + 4, (e.Bounds.Height - 8 - roundedFontSize) / 2, e.Bounds.Width, roundedFontSize + 6);
e.Graphics.DrawString(e.Header.Text, e.Font, new SolidBrush(SystemColors.ControlText), bounds);
}
