Returns the Trendlines collection for the series. A trendline graphically shows trends in a data series, such as increased sales over a period of months.

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 public Trendlines Trendlines{ get; }
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<p>Public ReadOnly Property Trendlines() As Trendlines</p>

An exception will be thrown if the current series does not support trendlines. The following types of series do not support trendlines: