PhoneSystem Class

try
{
    PhoneSystem.ApplicationName = appname;
    PhoneSystem.CfgServerHost = cfghost;
    PhoneSystem.CfgServerPort = cfgport;
    PhoneSystem.CfgServerUser = cfguser;
    PhoneSystem.CfgServerPassword = cfgpassword;
    var root = PhoneSystem.Root;
    root.Inserted += insertHandler;
    root.Updated += updatHandler;
    root.Deleted += deleteHandler;
}
catch
{
    //we are here without subscription to the events and need to repeat code in try section
}

PhoneSystem ps = PhoneSystem.Reset(appname, cfghost, cfgport, cfguser, cfgpassword, insertedHandler, updatedHandler, deletedHandler)
while(!ps.WaitForConnection(Timespan.FromSeconds))
{
    //no connection handler
}