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Id
4438820
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0
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0
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0
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CreationDate
2010-12-14T11:49:19.577
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0
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2010-12-14T11:54:42.540
LastEditDate
2010-12-14T11:54:42.540
LastEditorUserId
82062
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82062
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4438662
PostTypeId
2
Score
3
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0
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text
Body
For explanation, take a look at other answers. I'm just providing one way to handle this issue. You might like <a href="http://brendan.enrick.com/post/LINQ-Your-Collections-with-IEqualityComparer-and-Lambda-Expressions.aspx" rel="nofollow">this</a>: <pre><code>public class LambdaComparer<T>:IEqualityComparer<T>{ private readonly Func<T,T,bool> _comparer; private readonly Func<T,int> _hash; public LambdaComparer(Func<T,T,bool> comparer): this(comparer,o=>0) {} public LambdaComparer(Func<T,T,bool> comparer,Func<T,int> hash){ if(comparer==null) throw new ArgumentNullException("comparer"); if(hash==null) throw new ArgumentNullException("hash"); _comparer=comparer; _hash=hash; } public bool Equals(T x,T y){ return _comparer(x,y); } public int GetHashCode(T obj){ return _hash(obj); } } </code></pre> Usage: <pre><code>public void Foo{ public string Fizz{get;set;} public BarEnum Bar{get;set;} } public enum BarEnum {One,Two,Three} var lst=new List<Foo>(); lst.Distinct(new LambdaComparer<Foo>( (x1,x2)=>x1.Fizz==x2.Fizz&& x1.Bar==x2.Bar)); </code></pre> You can even wrap it around to avoid writing noisy <code>new LambdaComparer<T>(...)</code> thing: <pre><code>public static class EnumerableExtensions{ public static IEnumerable<T> SmartDistinct<T> (this IEnumerable<T> lst, Func<T, T, bool> pred){ return lst.Distinct(new LambdaComparer<T>(pred)); } } </code></pre> Usage: <pre><code>lst.SmartDistinct((x1,x2)=>x1.Fizz==x2.Fizz&&x1.Bar==x2.Bar); </code></pre> NB: works reliably only for Linq2Objects
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1. POUsing Distinct with LINQ and Objects
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1. PTAnswer
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1. USArnis Lapsa
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1. USArnis Lapsa
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