C#,ASP.NET(Simple Method To Check If File Exists)

public static class ImageType

{

    #region ImageTypes

    public const string Image498x331 = "ImageName.jpg";

    public const string Image196x255 = "ImageName.jpg";

    #endregion ImageTypes

}

public static class clsImage

{

    public const string imgPath = @"ImagePath/here";

    public static string isImageExists(string checkFile, string ImageType)

    {

        #region ImageExists

        try

        {

            if ((checkFile.Trim() != "") && (checkFile.Trim() != string.Empty))

            {

                if (File.Exists(HttpContext.Current.Server.MapPath(checkFile)))

                {

                    return checkFile;

                }

                else

                {

                    return getalternatePath(ImageType);

                }

            }

            else

            {

                return getalternatePath(ImageType);

            }

        }

        catch (Exception ex)

        {

            ErrLog.WriteLog(ex.Message, "isImageExists", "checkFile=" + checkFile + "ImageType=" + ImageType , "clsGeneral.cs");

            return getalternatePath(ImageType);

        }

        #endregion

    }

    private static string getalternatePath(string ImageType)

    {

        #region AlternatePath

        string AlternatePath = imgPath + "notFound/" + ImageType;

        if (!File.Exists(HttpContext.Current.Server.MapPath(AlternatePath)))

        {

            AlternatePath = "Not Available";

        }

       

        return AlternatePath; 

  

        #endregion

    }

}