请问怎么把这两条合并在一起？

Question

  <appSettings>
<add key="DateConn" value="Data Source=WWW-ABDE99F75DF;Initial Catalog=DB;User ID=sa;Password=123"/>
   </appSettings>
   <connectionStrings>
         <add name="DataBaseConnString" connectionString="Data Source=WWW-ABDE99F75DF;Initial Catalog=DB;Persist Security Info=True;User ID=sa;Password=123" providerName="System.Data.SqlClient"/>
  </connectionStrings>

Answer 1

每次连接数据库都用<connectionStrings> 内的连接字符串，<appSettings> 里的可以删除

Answer 2

两者选其一即可.
如用<appSettings> 
代码获取为:
string strDateConn= ConfigurationManager.AppSettings["DateConn"]如用<connectionStrings> 
代码获取为:
string strDataBaseConnString= ConfigurationManager.ConnectionStrings["DataBaseConnString"].ConnectionString;