Helps to create the URLs for the Reddit API in C#

RedditUrlBuilder

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ZeroBugBounce.ReddShift
{
  public class RedditUrlBuilder
	{
		// http://www.reddit.com/top/?sort=top&t=week

		internal const string FrontPageSubredditName = "<front page>";
		public const string RedditUrl = @"http://www.reddit.com";
		public SubredditUrlBuilder FrontPage()
		{
			return Subreddit(FrontPageSubredditName);
		}

		public SubredditUrlBuilder Subreddit(String subredditName)
		{
			return new SubredditUrlBuilder(subredditName);
		}

		public CommentsUrlBuilder Comments(String permalink)
		{
			return new CommentsUrlBuilder(permalink);
		}
	}

	public class CommentsUrlBuilder
	{
		string permaLink;
		string returnType;

		public CommentsUrlBuilder(string permaLink)
		{
			this.permaLink = permaLink;
		}

		public CommentsUrlBuilder Json()
		{
			returnType = ".json";
			return this;
		}

		public CommentsUrlBuilder Xml()
		{
			returnType = ".xml";
			return this;
		}

		public override string ToString()
		{
			return RedditUrlBuilder.RedditUrl + permaLink + returnType;
		}
	}

	public class SubredditUrlBuilder
	{
		String subredditName;
		string returnType;
		string sort; // for new, top
		string timespan; // for top: today, week, month, all
		string tab;
		string countAfter;

		public SubredditUrlBuilder(String subredditName)
		{
			this.subredditName = subredditName;
		}

		public SubredditUrlBuilder Json()
		{
			returnType = ".json";
			return this;
		}

		public SubredditUrlBuilder CountAfter(int count, string after)
		{
			countAfter = "count=" + count.ToString() + "&after=" + after;
			return this;
		}

		public SubredditUrlBuilder Xml()
		{
			returnType = ".xml";
			return this;
		}

		public SubredditUrlBuilder Tab(Tab selectedTab)
		{
			tab = selectedTab.ToString().ToLowerInvariant();
			return this;
		}

		public SubredditUrlBuilder Hot()
		{
			tab = "hot";
			return this;
		}

		public SubredditUrlBuilder New()
		{
			tab = "new";
			//			sort = "new";
			return this;
		}

		public SubredditUrlBuilder Rising()
		{
			tab = "rising";
			return this;
		}

		public SubredditUrlBuilder Top()
		{
			tab = "top";
			return this;
		}

		public SubredditUrlBuilder Top(TopSort topSort)
		{
			tab = "top";
			timespan = topSort.ToString().ToLowerInvariant();
			return this;
		}

		public SubredditUrlBuilder About()
		{
			tab = "about";
			return this;
		}

		public enum TopSort : int
		{
			Hour = 1,
			Day,
			Week,
			Month,
			Year,
			All
		}

		public override string ToString()
		{
			var urlStringBuilder = new StringBuilder(RedditUrlBuilder.RedditUrl, 100);
			urlStringBuilder.Append(@"/");

			if (subredditName != RedditUrlBuilder.FrontPageSubredditName)
			{
				urlStringBuilder.Append(@"r/");
				urlStringBuilder.Append(subredditName);
				urlStringBuilder.Append(@"/");

				if (!String.IsNullOrEmpty(tab))
				{
					urlStringBuilder.Append(tab);
					urlStringBuilder.Append(@"/");
				}
			}

			if (!String.IsNullOrEmpty(returnType))
			{
				urlStringBuilder.Append(returnType);
			}

			bool hasQueryStringDelimiter = false;

			if (tab == "top" && !String.IsNullOrEmpty(timespan))
			{
				urlStringBuilder.Append("?t=");
				urlStringBuilder.Append(timespan);
				hasQueryStringDelimiter = true;
			}
			else if (tab == "new")
			{
				urlStringBuilder.Append("?sort=");
				urlStringBuilder.Append(sort);
				hasQueryStringDelimiter = true;
			}

			if (!String.IsNullOrEmpty(countAfter))
			{
				if (!hasQueryStringDelimiter)
				{
					urlStringBuilder.Append("?");
				}

				urlStringBuilder.Append(countAfter);
			}

			return urlStringBuilder.ToString();
		}
	}

	public enum Tab
	{
		Hot = 1,
		New,
		Rising,
		Controversial,
		Top
	}

	public enum TopTimespan
	{
		Hour = 1,
		Today,
		Week,
		Month,
		Year,
		AllTime
	}
}