Web Helper ASP.Net

#region using
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Text;
using System.Threading;
using System.IO;
using System.Net;
using System.Diagnostics;
using System.Configuration;
using System.Web;
using System.Web.Util;
using System.Web.UI;
using System.Web.SessionState;
using System.Web.Mail;
using System.Web.Hosting;
using System.Web.Caching;
#endregion

 public class WebHelper {
    #region Utility Methods
    public string GetRequestPath(string query) {
        UriBuilder u = new UriBuilder(Request.Url);
        u.Query = query;
        return u.ToString();
    }
    public string GetRequestDirectory() {
        return Path.GetDirectoryName(Request.PhysicalPath);
    }
    public string GetSetting(string settingName) {
        return System.Configuration.ConfigurationManager.AppSettings[settingName];
    }
    public string GetSetting(string settingName,string defValue) {
        string result = System.Configuration.ConfigurationManager.AppSettings[settingName];
        if (string.IsNullOrEmpty(result))
            return defValue;
        return result;
    }
    public T GetSetting<T>(string settingName) {
        string result = System.Configuration.ConfigurationManager.AppSettings[settingName];
        if (string.IsNullOrEmpty(result))
            return default(T);
        return (T)Convert.ChangeType(result, typeof(T));
    }
    public T GetSetting<T>(string settingName, T defValue) {
        string result = System.Configuration.ConfigurationManager.AppSettings[settingName];
        if (string.IsNullOrEmpty(result))
            return defValue;
        return (T)Convert.ChangeType(result, typeof(T));
    }
    public string this[string settingName] {
        get { return GetSetting(settingName); }
    }
    public string this[string settingName, string defValue] {
        get { return GetSetting(settingName, defValue); }
    }
    public System.Collections.Specialized.NameValueCollection AppSettings {
        get {
            return System.Configuration.ConfigurationManager.AppSettings;
        }
    }
    public System.Configuration.ConnectionStringSettingsCollection ConnectionStrings {
        get {
            return System.Configuration.ConfigurationManager.ConnectionStrings;
        }
    }
    public void SendEmail(string data) {

        string from = "[email protected]";
        string to = "[email protected]";
        string sub = "Message Sent on " + DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToLongTimeString();
        string body = data;
        string formatType = "Html"; //Text,Html;
        string smtpServer = "smtp.gmail.com";
        string smtpUserName = "andrew4582.shadow";
        string smtpPassword = "******";
        bool useSSL = true;

        EmailHelper em = new EmailHelper();
        em.UseAsyncEmail = true;
        em.SmtpServer = smtpServer;
        em.SmtpUserName = smtpUserName;
        em.SmtpPassword = smtpPassword;
        em.UseSSL = useSSL;
        em.SendEmail(from, to, null, sub, body, formatType);
    }
    public static string GetWebDirectory(string virtualDirectory) {
        string webDir = HttpContext.Current.Server.MapPath(virtualDirectory);
        if (!Directory.Exists(webDir))
            Directory.CreateDirectory(webDir);
        return webDir;
    }
    public static string GetDirectory(string directoryName) {
        string appDir = Path.GetDirectoryName(HttpContext.Current.Request.PhysicalPath);
        string dir = Path.Combine(appDir, directoryName);
        if (!Directory.Exists(dir))
            Directory.CreateDirectory(dir);
        return dir;
    }
    public static bool TryReadAllText(string path, out string content) {
        content = null;
        if (!File.Exists(path))
            return false;
        content = File.ReadAllText(path);
        return true;
    }
    public static void WriteAllText(string path, string content) {
        string dirName = (Path.GetDirectoryName(path));
        File.WriteAllText(path, content);
    }
    public static string GetTimeStampedForFileName() {
        DateTime n = DateTime.Now;
        string dirName = n.Year + "-" + n.Month + "-" + n.Day + "_" + n.Hour + "-" + n.Minute;
        dirName += n.Second + "-" + n.Millisecond;
        return dirName;
    }
    public static string GetTimeStampedForFileName(string fileNameToModify) {
        string ext = Path.GetExtension(fileNameToModify);
        string fn = Path.GetFileNameWithoutExtension(fileNameToModify);
        string result = fn + "_" + GetTimeStampedForFileName() + "." + ext;
        return result;
    }
    private string GetTempFile() {
        string appDir = Path.GetDirectoryName(Request.PhysicalPath);
        string tempDir = Path.Combine(appDir, "temp");
        if (!Directory.Exists(tempDir))
            Directory.CreateDirectory(tempDir);
        string tempFileName = Path.GetTempFileName();
        string tempFullPath = Path.Combine(tempDir, tempFileName);
        return tempFullPath;
    }
   public static bool IsNullOrEmpty(string svalue) {
        if (string.IsNullOrEmpty(svalue))
            return true;
        if (string.IsNullOrEmpty(svalue.Trim()))
            return true;
        return false;
    }
}