or
ItemPropertyDefinition tagDefinition = new ItemPropertyDefinition("Tags.Tag", typeof(string), "Tags");this.RadDataFilterBlogProperties.ItemPropertyDefinitions.Add(tagDefinition);private RadPieChart BuildPieChart(ContentModel contentData) { // Chart var chart = new RadPieChart(); // Chart's Pie Series var pieSeries = new PieSeries { Name = "PieSeries", ShowLabels = true }; // Building Data Points GetDataPoints(contentData, ContentTypeFlag.PieChartStatic).ToList().ForEach(a => { pieSeries.DataPoints.Add(a); pieSeries.SliceStyles.Add(Util.GenerateSliceStyle()); }); chart.Series.Add(pieSeries); return chart;}