oxy_gannt.linq

<Query Kind="Statements">
  <Reference>&lt;RuntimeDirectory&gt;\System.Windows.Forms.dll</Reference>
  <NuGetReference>OxyPlot.WindowsForms</NuGetReference>
  <Namespace>OxyPlot</Namespace>
  <Namespace>OxyPlot.Axes</Namespace>
  <Namespace>OxyPlot.Series</Namespace>
</Query>

var pm = new PlotModel
{
	IsLegendVisible = true,
	LegendPlacement = LegendPlacement.Outside,
	LegendPosition = LegendPosition.LeftTop
};

var xaxis = new DateTimeAxis
{
	Position = AxisPosition.Bottom,
	StringFormat = "h:mm"
};
pm.Axes.Add(xaxis);

var yaxis = new LinearAxis
{
	IsAxisVisible = false,
	IsPanEnabled = false,
	IsZoomEnabled = false
};
pm.Axes.Add(yaxis);

var gannt1 = new RectangleBarSeries();
gannt1.Title = "AAA";
gannt1.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 30, 0))), 0,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 32, 0))), 1)
);
gannt1.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 35, 0))), 0,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 37, 0))), 1)
);
gannt1.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 43, 0))), 0,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 44, 0))), 1)
);
pm.Series.Add(gannt1);

var gannt2 = new RectangleBarSeries();
gannt2.Title = "BBB";
gannt2.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 31, 0))), 1,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 33, 0))), 2)
);
gannt2.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 35, 0))), 1,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 40, 0))), 2)
);
gannt2.Items.Add(new RectangleBarItem(
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 41, 0))), 1,
	DateTimeAxis.ToDouble(DateTime.Today.Add(new TimeSpan(8, 50, 0))), 2)
);
pm.Series.Add(gannt2);

new OxyPlot.WindowsForms.PlotView { Model = pm }.Dump();