public void ProcessRequest(HttpContext context)
{
    try
    {
        var responseTypeString = context.Request.QueryString["FileType"] ?? string.Empty;
        var responseType = Utilities.Extensions.ResponseTypeExtensions.FromString(responseTypeString);

        // Do some work
        var response = ""; // This variable is filled with the response to write to the context

        context.Response.ContentType = "text/plain";
        context.Response.Write(response);
    }
    catch (Exception e)

        public void DoWork(Action<HttpContext> work, HttpContext context)
        {
            try
            {
                var responseTypeString = context.Request.QueryString["FileType"] ?? string.Empty;
                var responseType = Utilities.Extensions.ResponseTypeExtensions.FromString(responseTypeString);

                work.Invoke(context);

                context.Response.ContentType = "text/plain";
                context.Response.Write("Hello World");
            }
            catch (Exception e)

        public void ProcessRequest(HttpContext context)
        {
            Action<HttpContext> work = (c) =>
            {
                var fields = context.Request.QueryString["Fields"] ?? _defaultFields;
                var site = context.Request.QueryString["Site"];

                if (string.IsNullOrWhiteSpace(site))
                {
                    throw new ArgumentException("The 'Site' parameter is required and cannot be empty.", "Site");
                }
            };

            DoWork(work, context);

abstract class Request
{
	private HttpContext _context;

	public Request(HttpContext context)
	{
		_context = context;
	}

	public void ProcessRequest()
	{
		try
		{
			var responseTypeString = _context.Request.QueryString["FileType"] ?? string.Empty;
			var responseType = Utilities.Extensions.ResponseTypeExtensions.FromString(responseTypeString);

			// Do some work
			var response = DoWork();

			_context.Response.ContentType = "text/plain";
			_context.Response.Write(response);
		}
		catch (Exception e)

while True:
  breath.in()
  breath.out()

            _context.Response.ContentType = "text/plain";
            _context.Response.Write(responseString);

    /// <summary>
    /// Summary description for SiteHistory
    /// </summary>
    public class SiteHistory : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            var request = new SiteHistoryRequest(context);
            request.ProcessRequest();
        }

        public bool IsReusable { get { return false; } }
    }

public class SiteHistoryRequest : Request<ArgumentExceptionResponse>
{
    private const string _defaultFields = "Date,TotalQuestions,TotalAnswers,QuestionAnswerRate,AnswerAcceptRate,AnswersPerQuestion";

    private string _fields;
    private string _site;

    public SiteHistoryRequest(HttpContext context)
        : base(context)
    {
        _fields = context.Request.QueryString["Fields"] ?? _defaultFields;
        _site = context.Request.QueryString["Site"];
    }

    protected override ApiResponseWrapper<ArgumentExceptionResponse> DoWork()