public void Connect()
{
IFoodAdminCallback clientCallback = OperationContext.Current.GetCallbackChannel <IFoodAdminCallback>();
if (!admins.Exists(x => x == clientCallback))
{
admins.Add(clientCallback);
}
}
public void Disconnect()
{
IFoodAdminCallback clientCallback = OperationContext.Current.GetCallbackChannel <IFoodAdminCallback>();
admins.Remove(clientCallback);
}
