'宣言
Public Shared ReadOnly _numberEqualityComparer As IEqualityComparer(Of Nullable(Of Double))
public static readonly IEqualityComparer<Nullable<double>> _numberEqualityComparer
'宣言
Public Shared ReadOnly _numberEqualityComparer As IEqualityComparer(Of Nullable(Of Double))
public static readonly IEqualityComparer<Nullable<double>> _numberEqualityComparer