This is an attempt on Windows Phone 8 to trigger a Contact's Details UI to be displayed by creating a VCF file. This is at the suggestion of @JustinAngel (http://www.twitter.com/JustinAngel/status/285552040636194816)

ShowContactTaskHackAttempt.cs

        private async void listBox_ItemTap(object sender, Telerik.Windows.Controls.ListBoxItemTapEventArgs e)
        {
            var result = (Contact)e.Item.AssociatedDataItem.Value;
            var test = new ContactInformation();
            test.GivenName = result.CompleteName.FirstName;
            test.FamilyName = result.CompleteName.LastName;
            test.DisplayName = result.DisplayName;
            var vCard = await test.ToVcardAsync();

            var tempName = Guid.NewGuid().ToString() + ".vcf";

            var file = await ApplicationData.Current.LocalFolder.CreateFileAsync(tempName);
            using (IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.ReadWrite))
            {
                using (IOutputStream outputStream = fileStream.GetOutputStreamAt(0))
                {
                    using (DataWriter dataWriter = new DataWriter(outputStream))
                    {
                        var vcardStream = vCard.AsStream();
                        var cardBytes = new byte[vcardStream.Length];
                        await vcardStream.ReadAsync(cardBytes, 0, (int)vcardStream.Length);
                        dataWriter.WriteBytes(cardBytes);
                        await dataWriter.StoreAsync();
                        dataWriter.DetachStream();
                    }

                    await outputStream.FlushAsync();
                }
            }

            await Launcher.LaunchFileAsync(
                await ApplicationData.Current.LocalFolder.GetFileAsync(tempName));
        }