public async Task <SkypeUser> FindUser(string userEmail)
{
ContactManager manager = client.ContactManager;
TaskCompletionSource <SearchResults> resultTaskCompletionSource = new TaskCompletionSource <SearchResults>();
manager.BeginSearch(
userEmail,
SearchProviders.Default,
SearchFields.EmailAddresses,
SearchOptions.ContactsOnly,
64,
(x) =>
{
try
{
if (x.IsCompleted)
{
resultTaskCompletionSource.SetResult(manager.EndSearch(x));
return;
}
else
{
resultTaskCompletionSource.SetException(
new InvalidOperationException("Callback was raised but search wasn't finished."));
return;
}
}
catch (Exception e)
{
resultTaskCompletionSource.SetException(e);
return;
}
},
null);
SearchResults results = await resultTaskCompletionSource.Task;
if (results.Contacts.Count == 1)
{
SkypeUser user = new SkypeUser(results.Contacts[0]);
this.AddUserToSubscription(user);
return(user);
}
else
{
throw new InvalidOperationException("Multiple users were found with the specified email.");
}
}
private void AddUserToSubscription(SkypeUser skypeUser)
{
bool hadNoExistingSubscription = false;
if (this.subscription == null)
{
this.subscription = this.client.ContactManager.CreateSubscription();
hadNoExistingSubscription = true;
}
this.subscription.AddContact(skypeUser.Contact);
if (hadNoExistingSubscription)
{
this.subscription.Subscribe(
ContactSubscriptionRefreshRate.High,
new ContactInformationType[] { ContactInformationType.Activity });
}
}
