Remove duplicate in linq list?

Question

I have a list of an entity

ID  NAME    Age Comment
1   B   33  C1
2   B   33  c2
3   A   33  c3

but i just want

ID  NAME    Age Comment
1   B   33  C1
3   A   33  c3

not want duplicate for name and age combination .

@Xaruth can you please give an example for the above scenario. It would be helpful .Thanks — Rahul Chowdhury
– Rahul Chowdhury, Commented Sep 18, 2013 at 5:27

Sergey Berezovskiy · Accepted Answer · 2013-09-17 16:53:46Z

4

var results = source.GroupBy(x => new { x.Name, x.Age })
                    .Select(g => g.First())
                    .ToList();

Or you can use DistinctBy from moreLINQ library.

edited Sep 17, 2013 at 16:53

Sergey Berezovskiy

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answered Sep 13, 2013 at 11:53

MarcinJuraszek

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2 Comments

Sven Grosen Over a year ago

I agree that this definitely works (and would be my preferred method in a vacuum), but just want to point out that, depending on the size of the source, this may be computationally intensive compared to the annoying to use .Distinct(IEqualityComparer) option.

Rahul Chowdhury Over a year ago

@MarcinJuraszek - Its works like a charm :).Can you gave me an example for the same using Distinct .It would be more helpful for us for understanding

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