In a multiple series chart, this property controls the primary series used for the Limit operation. Other series' elements will be matched with the primary series elements and that order will be maintained regardless of the values of the other series. For example, if you limit to the top 5 values and set the LimitPrimarySeries to the sales series other series such as dollar amount or quantity would not affect which elements were ultimately selected for the chart.

'Declaration
 
Public Property LimitPrimarySeries As String

'Usage
 
Dim instance As ChartArea
Dim value As String
 
instance.LimitPrimarySeries = value
 
value = instance.LimitPrimarySeries

public string LimitPrimarySeries {get; set;}