Question

This may be the simple question to answer, but I am struggling to resolve.

I have Web.config with the following values in my Web Application.

<appSettings>
    <add key ="FirstName" value ="Prasad"/>
    <add key ="LastName" value ="Kanaparthi"/>
</appSettings>

I have App.config with following value in my Class Library (Say Lib).

<appSettings>
    <add key ="FullName" value ="Prasad Kanaparthi"/>
</appSettings>

The class library(Lib) is pluggable component, I have added the Class Library(Lib) reference in my Web Application.

I have the below code in my Class Library(Lib). When i create instance for GetAppSettings in my web application i can see below responses.

namespace Lib
{
    public class GetAppSettings
    {
        public GetAppSettings()
        {
            var FirstName = ConfigurationManager.AppSettings["FirstName"];  // O/P : Prasad
            var MiddleName = ConfigurationManager.AppSettings["LastName"];  // O/P : Kanaparthi

            var FullName = ConfigurationManager.AppSettings["FullName"];    // O/P : null
        }
    }
}

The Question is how can i read FullName from App.config which is Class Library (Lib).

Note: Since my Lib is pluggable component, So the consumers can change the FullName of their own. I cannot merge values to Web.confing from App.config.

Answer 1

You have to merge both configuration sections and place all settings in the main configuration file of your application. In case of the web applciation it would be the web.config.