'宣言 Public MustOverride ReadOnly Property Features As C1DocumentSourceFeatures
'使用法 Dim instance As C1DocumentSource Dim value As C1DocumentSourceFeatures value = instance.Features
public abstract C1DocumentSourceFeatures Features {get;}
'宣言 Public MustOverride ReadOnly Property Features As C1DocumentSourceFeatures
'使用法 Dim instance As C1DocumentSource Dim value As C1DocumentSourceFeatures value = instance.Features
public abstract C1DocumentSourceFeatures Features {get;}