'宣言 Public Class NullableInt64SumAggregator Inherits Infragistics.Olap.Aggregator(Of Nullable(Of Long)) Implements IAggregator, Infragistics.Olap.IAggregator(Of Nullable(Of Long)), Infragistics.Olap.IAggregator(Of Nullable(Of Long),Nullable(Of Long),Nullable(Of Long))
public class NullableInt64SumAggregator : Infragistics.Olap.Aggregator<Nullable<long>>, IAggregator, Infragistics.Olap.IAggregator<Nullable<long>>, Infragistics.Olap.IAggregator<Nullable<long>,Nullable<long>,Nullable<long>>