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void Session_Start(object sender, EventArgs e)
{
Application.Lock();
try
{
Application["online"].ToString() ;
}
catch
{
Application["online"]="";
}
try
{
Application["userName"].ToString() ;
}
catch
{
Application["userName"]="";
}
finally
{
Application["online"] = Application["online"].ToString() + Session["userName"].ToString();
Application.UnLock();
}
}