>I'm reading the value of a column in a dataset into a textbox:
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>

>txtAuthor.Text = (string)oDataSet.Tables[0].Rows[0]["Author"];
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>
>On some records, the Author is null, so I get a cast exception. Can someone help a newbie?

You should be able to use this syntax:

txtAuthor.Text = (string)oDataSet.Tables[0].Rows[0]["Author"] ?? "";

If the first expression is null it will use the second instead.