Invalid cast from 'System.String' to 'WebServiceWrapper.ItemMaster'
<p>I am getting an invalid cast error from 'System.String' to 'WebServiceWrapper.ItemMaster'. This is my code:</p>

<pre><code>public class ItemMaster
{
    public static ItemMaster loadFromReader(string oReader)
    {
        ItemMaster i = (ItemMaster)Convert.ChangeType(oReader, typeof(ItemMaster));
        return i;
    }
}
</code></pre>
