/C#/C# distinct comparer multiple properties

C# distinct comparer multiple properties

List<Person> distinctPeople = allPeople
  .GroupBy(p => new {p.PersonId, p.FavoriteColor} )
  .Select(g => g.First())
  .ToList();

Source: stackoverflow.com

C# distinct comparer multiple properties

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

Source: stackoverflow.com

Similar codes

27 votes138 views3 answers
Unity textmesh pro
C#Unity
0 vote217 views1 answer
Add dynamic value in startup file in .net core api
C#
0 vote109 views1 answer
Check c# date for 0001/01/01
C#
3 votes74 views1 answer
C# url request simple
C#
3 votes111 views1 answer
C# writeline
C#
0 vote114 views2 answers
How to close a form c#
C#
0 vote142 views1 answer
How to get total scenes unity
C#Unity
0 vote114 views1 answer
Phone
C#
0 vote124 views1 answer
More than one migrations configuration type was found in the assembly 'EFCodeFirst'. Specify the name of the one to use
C#
0 vote118 views1 answer
SortDescriptions wpf
C#