'宣言 Public Overrides Function Sum( _ ByVal value1 As Nullable(Of Short), _ ByVal value2 As Nullable(Of Decimal) _ ) As Nullable(Of Decimal)
public override Nullable<decimal> Sum( Nullable<short> value1, Nullable<decimal> value2 )
NullableInt16AverageAggregator クラス NullableInt16AverageAggregator メンバ