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public void SaveContacts(string Name, string Number)
{

    var activity = Forms.Context as Activity;
    var intent = new Intent(Intent.ActionInsert);
    intent.SetType(ContactsContract.Contacts.ContentType);
    intent.PutExtra(ContactsContract.Intents.Insert.Name, Name);
    intent.PutExtra(ContactsContract.Intents.Insert.Phone, Number);
    activity.StartActivity(intent);
    Toast.MakeText(activity, "ContactSaved", ToastLength.Short).Show();
}