Gets a SqlHierarchyId with a hierarchy identification of nullnull 引用（在 Visual Basic 中为 Nothing）.
命名空间： Microsoft.SqlServer.Types
程序集： Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）
语法
声明
Public Shared ReadOnly Property Null As SqlHierarchyId
Get
用法
Dim value As SqlHierarchyId
value = SqlHierarchyId.Null
public static SqlHierarchyId Null { get; }
public:
static property SqlHierarchyId Null {
SqlHierarchyId get ();
}
static member Null : SqlHierarchyId
static function get Null () : SqlHierarchyId
属性值
类型：Microsoft.SqlServer.Types.SqlHierarchyId
SqlHierarchyId with a value of nullnull 引用（在 Visual Basic 中为 Nothing）.
注释
This member is static.