NavigationService.BackStack.FirstOrDefault（）不包含Windows Phone 8中的定義？
[英]NavigationService.BackStack.FirstOrDefault() does not contains definition in Windows Phone 8?
問題描述
我正在嘗試使用WP8中的以下內容在導航中獲取最后一頁
var lastPage = NavigationService.BackStack.FirstOrDefault();
但Visual Studio 12抱怨它不包含FirstOrDefault的定義
1 個解決方案
解決方案1
6 已采納 2013-03-29 07:09:26
不要忘記using System.Linq;添加using System.Linq; 在代碼文件的頂部。
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