Enums and flags checks in a given environmental condition

I have a event ServerStateReceived here checking condition of 4 servers whether they are UP or Down going on.In this particular type of scenario server will be down on beginning but after sometime server should be Up.So all 4 servers down and ReadySent = true; is a rare case we need to look . I have a method public write() in this method I need a logic to check a condition that if the flag ReadySent = true; and all servers Are DOWN in the event ServerStateReceived,if it satisying control should go to event ServerStateReceived . if I wait here for some time the all 4 servers will be UP in that time only control wi开发者_JS百科ll come from ServerStateReceived event to write(),,I don’t want to use sleep() method or suspend etc,,I need a logic Here through code

This is the algorithm for that this is not c# code

Write()
{
If(ReadySent = true && all servers  in the event EventHandler ServerStateReceived DOWN) 
Go to 
              public event EventHandler ServerStateReceived
              {
here checks going on 
if(all servers UP)
go to write() method
}
}

Here is the c# code where i need to implement above logic

Public write()
{
// here need the logic to move control to event ServerStateReceived if both flag ReadySent = true; and all servers DOWN stay there for some time without using sleep() once they all UP program control will come to write() method
}

private enum StateType : int
              {
                 Initial = 0,
                 Up = 1,
                 Down = 2
              }
              public event EventHandler ServerStateReceived
              {
              add
                 {
                    m_events.AddHandler(ServerStateEvent, value);
                                if (m_alarmServerUp == StateType.Up)
                    {
                       value(this,
                          new ServerStateEventArgs(ServerComponentType.AlarmServer, true));
                    }
                    else
                    {
                       value(this,
                          new ServerStateEventArgs(ServerComponentType.AlarmServer, false));
                    }
                   .
                   .
                   .

    // **like this 3 more conditions checking are going on(total 4)**

Public Write()
{
   System.Threading.Thread.Sleep(20000);
}

This will work but I need an fix for this through code on based on the algorithm or logic I have posted on the question