'宣言
Public Class _OptionLegendMergePolicy Inherits _BaseLegendMergePolicy Implements ILegendMergePolicy, ILegendMergePolicyBuilder, IPlugin, IQueryInterface
public class _OptionLegendMergePolicy : _BaseLegendMergePolicy, ILegendMergePolicy, ILegendMergePolicyBuilder, IPlugin, IQueryInterface