Maintaining error log

Here I am simplfying error log implementaiton.
To maintain error log its good to have log for each day for a better review .
so here we will create log file everyday , and when file already exist will append error entry in to it.
For that create one class and write following method....

C#
Add this 2 Namespace
using System.IO;

using System.Globalization;

and the Rest of game will be handled by this class

public static void WriteError(string errorMessage)

    {

        try

        {

            //Specify path where log file to be created

            string logfilePath = "~/Error/" + DateTime.Today.ToString("dd-mm-yy") + ".txt";

            if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(logfilePath)))

            {

                File.Create(System.Web.HttpContext.Current.Server.MapPath(logfilePath)).Close();

            }

            using (StreamWriter wrtr = File.AppendText(System.Web.HttpContext.Current.Server.MapPath(logfilePath)))

            {

                wrtr.WriteLine("\r\nLog Entry : ");

                wrtr.WriteLine("{0}", DateTime.Now.ToString(CultureInfo.InvariantCulture));

                string err = "Error in: " + System.Web.HttpContext.Current.Request.Url.ToString() +

                ". Error Message:" + errorMessage;

                wrtr.WriteLine(err);

                wrtr.WriteLine("__________________________");

                wrtr.Flush();

                wrtr.Close();

            }

        }

        catch (Exception ex)

        {

            WriteError(ex.Message);

        }

    }

Have a nice day... 'N happy Coding :)