/// <summary>
/// Converts a value returned from a LearningStore query to a
/// <c>CorrectResponseItemIdentifier</c>. Throws an exception if the value is
/// <c>DBNull</c>.
/// </summary>
///
/// <param name="value">A value from a <c>DataRow</c> within a <c>DataTable</c>
/// returned from a LearningStore query.</param>
///
/// <param name="result">Where to store the result.</param>
///
public static void CastNonNull(object value, out CorrectResponseItemIdentifier result)
{
LearningStoreItemIdentifier id;
CastNonNull(value, out id);
result = new CorrectResponseItemIdentifier(id);
}
/// <summary>
/// Converts a value returned from a LearningStore query to a
/// <c>CorrectResponseItemIdentifier</c>, or <c>null</c> if the value is <c>DBNull</c>.
/// </summary>
///
/// <param name="value">A value from a <c>DataRow</c> within a <c>DataTable</c>
/// returned from a LearningStore query.</param>
///
/// <param name="result">Where to store the result.</param>
///
public static void Cast(object value, out CorrectResponseItemIdentifier result)
{
LearningStoreItemIdentifier id;
Cast(value, out id);
result = (id == null) ? null : new CorrectResponseItemIdentifier(id);
}