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{description}
{excerpt}[Trendlines|Trendlines] is a collection of all [Trendline|Trendline] objects associated with a data series in a chart. To return a {{Trendlines}} collection, use [Series.Trendlines|Series.Trendlines] .{excerpt}
{signature:C#}
[DefaultMember("Item")]
 public sealed class Trendlines : System.Collections.Generic.IEnumerable<Trendline>
{signature}{signature:vb.net}
<DefaultMember("Item")> _
	Public NotInheritable Class Trendlines
		Implements System.Collections.Generic.IEnumerable(Of Trendline)
{signature}
{properties}
||Name||Description||
|[Count|Trendlines.Count]|{excerpt-include:Trendlines.Count|nopanel=true}|
{indexers}
||Name||Description||
|[Item(Int32)|Trendlines.Item(Int32)]|{excerpt-include:Trendlines.Item(Int32)|nopanel=true}|
{methods}
||Name||Description||
|[CreateTrendline(Regression)|Trendlines.CreateTrendline(Trendline.Regression)]|{excerpt-include:Trendlines.CreateTrendline(Trendline.Regression)|nopanel=true}|
|[GetEnumerator()|Trendlines.GetEnumerator()]|{excerpt-include:Trendlines.GetEnumerator()|nopanel=true}|
|[Remove(Int32)|Trendlines.Remove(Int32)]|{excerpt-include:Trendlines.Remove(Int32)|nopanel=true}|
|[Remove(Trendline)|Trendlines.Remove(Trendline)]|{excerpt-include:Trendlines.Remove(Trendline)|nopanel=true}|