Read from App.config in a Class Library project

Question

I am developing a simple class library project, which will give me a dll.

I wanted a particular value to be read from a config file. So I have added an App.config file to my project.

 <?xml version="1.0" encoding="utf-8" ?>
 <configuration>

  <appSettings>
  <add key="serviceUrl" value="test value" />
  </appSettings>

  </configuration>

Above is my App.config file, and now I am trying to read it as following

  string strVal = System.Configuration.ConfigurationManager.AppSettings["serviceUrl"];

But I am not getting any value in my string variable.

I had done this for a web application in a similar way and it worked. But somehow I am not able to get this working.

Is the idea of having App.config in a class library project correct in the first place ?

Answer 1

As stated in my comment, add the App.Config file to the main solution and not in the class library project.

Answer 2

You dont need to add app.config file. If you create class library for web based application then you can fetch connection string directly from web.config file

OR

You can add any text file with connection string in it and fetch that string . using this

public static ConnectionStringSettings ConnSettings
{
    get
    {
        string connectionStringKey = null;
        connectionStringKey = ConfigurationManager.AppSettings.Get("DefaultConnectionString");
        return ConfigurationManager.ConnectionStrings[connectionStringKey];          
    }
}