This method also works for any app.config file in a VS project.  When you
compile the project, VS will create a file named "yourapp.exe.config" in the
bin directory.  In the app.config place lines like the following in the
<appSettings> section:

<add key="SettingName" value ="thevalue"/>

Then in your code use

string variable =
System.Configuration.ConfigurationSettings.AppSettings["SettingName"];

The appsettings method returns a string so you would have to convert it to
another type if you wanted to store numbers, etc.

Hope this helps.

No, I meant console application. Below is part of .NET documentation about
accessing settings in VB. How do I do the same in C#?
There is no My.Settings

This section contains topics describing the My.Settings object and the tasks
it enables you to accomplish.

My.Settings
The properties of the My.Settings object provide access to your
application's settings. To add or remove settings, use the Project Designer.
For more information, see How to: Add or Remove Application Settings.

The methods of the My.Settings object allow you to save the current user
settings or revert the user settings to the last saved values.

Tasks
The following table lists examples showing how to access an application's
forms.

     To  See
     Update the value of a user setting
    How to: Change User Settings in Visual Basic

     Display application and user settings in a property grid
    How to: Create Property Grids for User Settings in Visual Basic

     Save updated user setting values
    How to: Persist User Settings in Visual Basic

     Determine the values of user settings
    How to: Read Application Settings in Visual Basic