'宣言
Public Class _FieldSortDefinition Inherits _SortDefinition Implements GrapeCity.DataVisualization.Chart.IEquatable(Of ISortDefinition), IFieldSortDefinition, ISortDefinition
public class _FieldSortDefinition : _SortDefinition, GrapeCity.DataVisualization.Chart.IEquatable<ISortDefinition>, IFieldSortDefinition, ISortDefinition