A settings Enum that can read from the appSettings section in the web.config through extension methods allowing for strongly typed setting keys and easy retrieval of their values.

Example.cs

using System.Linq;
using TweetSharp;

public class Example {
  
  public static void Main(string[] args)  {
    
    // Get setting values
    string consumerKey = Setting.TwitterConsumerKey.GetValue<string>();
    string consumerSecret = Setting.TwitterConsumerSecret.GetValue<string>();
    string oauthToken = Setting.TwitterOAuthToken.GetValue<string>();
    string oauthTokenSecret = Setting.TwitterOAuthTokenSecret.GetValue<string>();
    int maxTweets = Setting.TwitterMaxTweetsToPull.GetValue<int>();
    
    // Create twitter client and fetch tweets
    var service = new TwitterService(consumerKey, consumerSecret, oauthToken, oauthTokenSecret);
    var options = new ListTweetsOnHomeTimelineOptions { Count = maxTweets };
    var tweets = service.ListTweetsOnHomeTimeline(options);
    
    // Print each tweet to the console
    foreach(var tweet in tweets) {
      Console.WriteLine(tweet.Text);
    }
    
  }
  
}

Setting.cs

using System.ComponentModel;

public enum Setting {
  
    [Description("Twitter:ConsumerKey")]
    TwitterConsumerKey,

    [Description("Twitter:ConsumerSecret")]
    TwitterConsumerSecret,

    [Description("Twitter:OAuthToken")]
    TwitterOAuthToken,

    [Description("Twitter:OAuthTokenSecret")]
    TwitterOAuthTokenSecret,
    
    [Description("Twitter:MaxTweetsToPull")]
    TwitterMaxTweetsToPull
    
}

SettingExtensions.cs

using System.Configuration;

public static class SettingExtensions {

  public static string GetDescription(this Setting setting) {
    var type = typeof (Setting);
    var member = type.GetMember(setting.ToString());
    var attrs = member[0].GetCustomAttributes(typeof (DescriptionAttribute), false);
    var descAttr = attrs[0] as DescriptionAttribute;
    return descAttr != null ? descAttr.Description : null;
  }

  public static object GetValue(this Setting setting) {
    var key = GetDescription(setting);
    return key != null ? ConfigurationManager.AppSettings[key] : null;
  }

  public static T GetValue<T>(this Setting setting) where T : class {
    return setting.GetValue() as T;
  }

}

web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="Twitter:ConsumerKey" value="aaaaaaaaaaaaaaaaaaaaaa"/>
    <add key="Twitter:ConsumerSecret" value="bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"/>
    <add key="Twitter:OAuthToken" value="000000000-cccccccccccccccccccccccccccccccccccccccc"/>
    <add key="Twitter:OAuthTokenSecret" value="dddddddddddddddddddddddddddddddddddddddddd"/>
    <add key="Twitter:MaxTweetsToPull" value="100"/>
  </appSettings>
</configuration>