OxyPloot设置X轴时间DateTimeAxis

var axisX = new DateTimeAxis();
axisX.Position = AxisPosition.Bottom;
axisX.Minimum = DateTimeAxis.ToDouble(DateTimeAxis.ToDouble(DateTime.Parse(DateTime.Today.ToString("yyyy/MM/dd") + " 00:00:00")));
axisX.Maximum = DateTimeAxis.ToDouble(DateTimeAxis.ToDouble(DateTime.Parse(DateTime.Today.ToString("yyyy/MM/dd") + " 23:59:59")));
axisX.IntervalType = DateTimeIntervalType.Hours;
axisX.MajorStep = 1.0 / 12;
axisX.MinorIntervalType = DateTimeIntervalType.Hours;
axisX.MinorStep = 1.0 / 24;
axisX.StringFormat = "HH:mm";