private DateTimeRect CreateRandomRect()
		{
			DateTimeRect rect = new DateTimeRect();
			rect.Start = lastFinish.AddMinutes(rnd.Next(2, 4));
			rect.Duration = TimeSpan.FromMinutes(rnd.Next(4, 8));
			rect.Y = rnd.NextDouble();
			rect.Height = 0.5 + rnd.NextDouble();

			lastFinish = rect.Start + rect.Duration;

			return rect;
		}
        private DateTimeRect CreateRandomRect()
        {
            DateTimeRect rect = new DateTimeRect();

            rect.Start    = lastFinish.AddMinutes(rnd.Next(2, 4));
            rect.Duration = TimeSpan.FromMinutes(rnd.Next(4, 8));
            rect.Y        = rnd.NextDouble();
            rect.Height   = 0.5 + rnd.NextDouble();

            lastFinish = rect.Start + rect.Duration;

            return(rect);
        }