public static IEnumerable <T> DistinctBy <T, TKey>(this IEnumerable <T> items, Func <T, TKey> property)
{
GeneralPropertyComparer <T, TKey> comparer = new GeneralPropertyComparer <T, TKey>(property);
return(items.Distinct(comparer));
}
public static IEnumerable <TSource> DistinctBy <TSource, TKey>(this IEnumerable <TSource> source, Func <TSource, TKey> keySelector)
{
var comparer = new GeneralPropertyComparer <TSource, TKey>(keySelector);
return(source.Distinct(comparer));
}