public static IOrderedQueryable <T> OrderBy <T>(this IQueryable <T> query, IOrderSpecification <T> specification)
{
if (specification == null)
{
throw new ArgumentNullException(nameof(specification));
}
return(specification.Invoke(query));
}
public static IOrderedEnumerable <T> ThenBy <T>(this IOrderedEnumerable <T> query, IOrderSpecification <T> specification)
{
return(specification == null
? throw new ArgumentNullException(nameof(specification))
: specification.Invoke(query));
}