System.Configuration.ConfigurationManager is not resolved

Question

In my usings I have:

using System.Configuration;

And then in the code I have:

string primary_adrs_key =  ConfigurationManager.AppSettings["PrimaryAddressK"];

But I get the error:

"The name ConfigurationManager does not exist in the current context"

Why? What am I missing?

Answer 1

Read ConfigurationManager

Add the reference System.Configuration.dll in your project

Answer 2

You haven't added reference to System.Configuration. Right click on project and click add references.