internal void DrawVerticalTick(Pen Pen, long x, int length)
{
this.graphics.DrawLine(Pen, this.ClientX(new DateTime(x)), this.canvasTopOffset + this.Height - (this.canvasBottomOffset + this.canvasTopOffset), this.ClientX(new DateTime(x)), this.canvasTopOffset + this.Height - (this.canvasBottomOffset + this.canvasTopOffset) + length);
}