c# nullable generic

static void Main(string[] args)<br /> {<br /> int? i = GetValueOrNull<int>(null, string.Empty);<br /> }</p> <p>public static Nullable<T> GetValueOrNull<T>(DbDataRecord reader, string columnName) where T : struct<br /> {<br /> object columnValue = reader[columnName];</p> <p> if (!(columnValue is DBNull))<br /> return (T)columnValue;</p> <p> return null;<br /> }