Web.config

<configuration>
 <appSettings>
  <add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;" />
    <add key="attachFileHome" value="P:\ASP.NET2010 Project\Weather\TownForecast\AttachFile\" />
 </appSettings>
 <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true"
      providerName="System.Data.SqlClient" />
    <add name="NalseeSourceConnectionString" connectionString="Data Source=JANGJEONGHUN-PC\sqlexpress;Initial Catalog=NalseeSource;Integrated Security=True"
      providerName="System.Data.SqlClient" />
   <add name="NalseeWebConnectionString" connectionString="Data Source=JANGJEONGHUN-PC\sqlexpress; Initial Catalog=NalseeWeb; Integrated Security=True"
      providerName="System.Data.SqlClient"/>
 </connectionStrings> 
</configuration>

값 호출
WebConfigurationManager.AppSettings["attachFileHome"].ToString()
WebConfigurationManager.ConnectionStrings["NalseeWebConnectionString"].ToString()