SPAction 升级的父级 SPSequence，名称。
命名空间： Microsoft.SharePoint.Upgrade
程序集： Microsoft.SharePoint（位于 Microsoft.SharePoint.dll 中）
语法
声明
Public Property ParentType As String
Get
Set
用法
Dim instance As SPUpgradeActionInfo
Dim value As String
value = instance.ParentType
instance.ParentType = value
public string ParentType { get; set; }