/// <summary>
/// Updates a contact specified the MyRemoteContact helper object from the contact store.
/// </summary>
/// <param name="remoteContact"></param>
/// <returns></returns>
public async Task DeleteContacts(ulong revision = 0)
{
Debug.WriteLine(String.Format("Getting changes since revision: {0}", revision));
// Call GetChangesAsync to get all changes since the specified revision.
var changeList = await contactStore.GetChangesAsync(revision);
foreach (var change in changeList)
{
// Each change record returned contains the change type, remote and local ids, and revision number
Debug.WriteLine(String.Format("Change Type: {0}\nLocal ID: {1}\nRemote ID: {2}\nRevision Number: {3}",
change.ChangeType.ToString(),
change.Id,
await remoteIdHelper.GetUntaggedRemoteId(contactStore, change.RemoteId),
change.RevisionNumber));
await contactStore.DeleteContactAsync(change.Id);
}
}