'宣言 Public Class DoubleAverageAggregator Inherits Infragistics.Olap.AverageAggregator(Of Double) Implements IAggregator, Infragistics.Olap.IAggregator(Of Nullable(Of Decimal),AverageValue(Of Double),Double)
public class DoubleAverageAggregator : Infragistics.Olap.AverageAggregator<double>, IAggregator, Infragistics.Olap.IAggregator<Nullable<decimal>,AverageValue<double>,double>