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Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.出错代码final TableRow row1 = (TableRow) findViewById(R

想在vs中连接数据库，添加“using System.Data.SqlClient;”引用时却报错“命名空间System中不存在Data"(大小写及拼写都正确）解决方法：右键项目中的引用→添加引用→浏览→找到“System.Data.dll”文件→添加解决了！！

Windows phone 真机调试时遇到如下错误Error : DEP6810 : MdilXapCompile.exe failed with error code 2001. See log file ‘C:\Users\Documents\Visual Studio 2013\Projects\obj\ARM\Release\MDIL\MDILXapCompileLog.txt’ for m