/// <summary>
/// Adds the given expression object to the given list of expression objects.
/// </summary>
/// <param name="expressions">Destination expression list for the given expression object.</param>
/// <param name="expression">Expression object to include in the list of expressions.</param>
/// <returns>The given expression list object to enable fluent syntax.</returns>
public static IList <Sql.SortExpression> ThenBy(this IList <Sql.SortExpression> expressions, Sql.SortExpression expression)
{
expressions.Add(expression);
return(expressions);
}
/// <summary>
/// Creates a new list of expression objects containing the given expressions.
/// </summary>
/// <param name="expression">First expression in the collection.</param>
/// <param name="secondExpression">Second expression in the collection.</param>
/// <returns>The newly created list of expression objects.</returns>
public static IList <Sql.SortExpression> ThenBy(this Sql.SortExpression expression, Sql.SortExpression secondExpression)
=> new List <Sql.SortExpression>()
{
expression, secondExpression
};