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Gets or sets the dash style for the specified line. Can be one of the LineDashStyle constants.
LineDashStyle DashStyle { get; set; }
Property DashStyle As LineDashStyle
IShape connector = worksheet.Shapes.AddConnector(ConnectorType.Straight, 10, 10, 200, 100);
ILineFormat line = connector.Line;
line.DashStyle = LineDashStyle.Dash;
LineDashStyle dashStyle = line.DashStyle;