'宣言 Public Class NullableInt64AverageAggregator Inherits Infragistics.Olap.AverageAggregator(Of Nullable(Of Long)) Implements IAggregator, Infragistics.Olap.IAggregator(Of Nullable(Of Decimal),AverageValue(Of Nullable(Of Long)),Nullable(Of Long))
public class NullableInt64AverageAggregator : Infragistics.Olap.AverageAggregator<Nullable<long>>, IAggregator, Infragistics.Olap.IAggregator<Nullable<decimal>,AverageValue<Nullable<long>>,Nullable<long>>