Restrict concurrent user access in asp.net

Question

User1607087669 posted

Requirement <o:p></o:p>

Suppose there is user with username TEST and if he is login from machine A  then we want from another machine  B  if a person tries to login with  TEST User name he should not be allowed to login.  <o:p></o:p>

<o:p> </o:p>

I have tried this code to do this<o:p></o:p>

        MembershipUser objr = Membership.GetUser(txtUsername.Text, false);


           online = objr.IsOnline;

            if (online ==true)
            {
                Response.RedirectPermanent("http://localhost/logistics/unauthorized.aspx");

 
              
            }

//and in web.config i have added this

    <membership defaultProvider="AspNetSqlMembershipProvider" userIsOnlineTimeWindow="1">

But problem is that this code only runs for 1 min a user tires to login after 1 min then he is able to login with same user name and password

I am using asp.net membership and C#.