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    DistinctBy()

    29-12-2015 11:14:11 C# / LINQ 0 Bookmark(s) 298 View(s)

     

    
public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
{
    var seenKeys = new HashSet<TKey>();
    return source.Where(element => seenKeys.Add(keySelector(element)));
}