<p>Looking up LINQ and Or in google is proving somewhat difficult so here I am.</p>

<p>I want to so the following:</p>

<pre><code>(from creditCard in AvailableCreditCards 
where creditCard.BillToName.ToLowerInvariant().Contains(txtFilter.Text.ToLowerInvariant())
**or creditCard.CardNumber.().Contains(txtFilter.Text)**
orderby creditCard.BillToName
select creditCard)
</code></pre>

You can use the .Where() function to accomplish this.
```
```
var cards = AvailableCreditCards.Where(card=> card.CardNumber.Contains(txtFilter.Text) || card.BillToName.ToLowerInvariant().Contains(txtFilter.Text.ToLowerInvariant());
```
```