string strConfigPath = Server.MapPath("~/LeaveManagementSystem_30_01_2012/web.config");
//strConfigPath = @"~/web.config";// HttpContext.Current.Request.ApplicationPath + "/" + "web.config";
Configuration config = OpenConfigFile(strConfigPath) as Configuration;
MailSettingsSectionGroup mailSettings = config.GetSectionGroup("system.net/mailSettings") as MailSettingsSectionGroup;
if (mailSettings != null)
{
int port = mailSettings.Smtp.Network.Port;
string host = mailSettings.Smtp.Network.Host;
string password = mailSettings.Smtp.Network.Password;
string username = mailSettings.Smtp.Network.UserName;
}