SPSequence.PlaceHolderSequence 属性
此序列不具有任何升级的逻辑 （尚）
命名空间： Microsoft.SharePoint.Upgrade
程序集： Microsoft.SharePoint（位于 Microsoft.SharePoint.dll 中）
语法
声明
Public Overridable ReadOnly Property PlaceHolderSequence As Boolean
Get
用法
Dim instance As SPSequence
Dim value As Boolean
value = instance.PlaceHolderSequence
public virtual bool PlaceHolderSequence { get; }