Recommendations for creating and closing WCF clients for asynchronous methods

I am familiar with the best practices for creating a WCF client by calling the standard method and then closing or interrupting the client upon completion, but I'm curious about asynchronous methods with clients.

I have a manager class that has some pass through events for the added consumption class to get the results of an asynchronous call. For instance:

internal sealed class CommController
{
    public event GetClientIdEventHandler ClientIdReceived;

    private readonly LocalCommSvcClient _localCommSvcClient = new LocalCommSvcClient();

    public CommController()
    {
        _localCommSvcClient.GetClientIdCompleted += (o, e) => ClientIdReceived(o, e);
    }

    public void GetClientIdAsync()
    {
        _localCommSvcClient.GetClientIdAsync();             
    }
}

But I do not see where the client closes and / or leaves. I could not find many best practices for closing WCF clients, as it relates to asynchronous use. Where should I put .Close () and / or .Abort () calls?