Unable to read new keys from App.config in C#.NET Windows Application

Question

my app.config file has 6 key-value pairs.

• I earlier had only three of them.
• I ran the application many a times before adding 3 more keys recently.
• But doing this, I always get "Null object reference" error.
• I can still read the old 3 values using below code, but it is unable to return me the values of newly added 3 keys:

return 
  System.Configuration
    .ConfigurationManager.AppSettings.Get("FTPDirectory").ToString();

What could be the possible reason?

Answer 1

Are you recompiling between changes to the app.config? msbuild will copy your app.config to the output folder as .exe.config, for example.