Oracle Datareader null check extention method

Can we create a extension method ToVauleOrDefault on the DataReader, so when we do reader.GetValue(ordinalId).ToValueOrDefault<string>, within that method it will check null and then convert using oracle datereader

public static T ValueOrDefault<T>(this XElement element, T defaultValue = default(T))
        {
            if (element == null)
            {
                return defaultValue;
            }

            return element.Value.To(defaultValue);
        }

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