gistfile1.txt

using System;

namespace PasteSharp
{
	public abstract  class PasteBin
	{
                public virtual void SendContentRequest(string content, string language, string expiry) {}
                public virtual SendContentRequest(string content, string nick, string channel ,string summary)
		public string  GetUrlRequest { get;  protected set;}
		public string  GetCententRequest { get;  protected set;}
		protected ISession Session;

		public PasteBin() {
			#if SOUP_SHARP
			    Session = new SoupSession();
			#else
			    Session = new WebClientSession();
			#endif
		}
	
	}
}

gistfile2.txt

using System;
using System.Text.RegularExpressions;

namespace PasteSharp
{
	public class Bpaste : PasteBin
	{
		public Bpaste () : base()
		{

		}

		public override void SendContentRequest(string content, string language, string expiry) {
			var match = Regex.Match(Session.Bpase (content, language, expiry), @"/raw/([0-9a-zA-Z]+)",RegexOptions.IgnoreCase);

			if (match.Success) {
			    GetUrlRequest = "https://bpaste.net/show/" + match.Groups [1].Value;
			}
		}
	}
}

gistfile3.cs

using System;
using System.Text.RegularExpressions;

namespace PasteSharp
{
	public class FpasteScsys : PasteBin
	{
		public override void SendContentRequest(string content, string nick, string channel ,string summary) {

			var match = Regex.Match(Session.FpasteScsys( content,  nick,  channel , summary), 
				@"(http://fpaste.scsys.co.uk/[0-9a-zA-Z]+)",RegexOptions.IgnoreCase);

		    if (match.Success) {
				GetUrlRequest = match.Groups [1].Value;
		    }
		}

		public FpasteScsys () : base()
		{
		}
	}
}