What about a throw away IEqualityComparer generic class ?
public class ThrowAwayEqualityComparer<T> : IEqualityComparer<T> { Func<T, T, bool> comparer; public ThrowAwayEqualityComparer<T>(Func<T, T, bool> comparer) { this.comparer = comparer; } public bool Equals(T a, T b) { return comparer(a, b); } public int GetHashCode(T a) { return a.GetHashCode(); } }
So now you can use Distinct.var distinctImages = allImages.Distinct( new ThrowAwayEqualityComparer<GalleryImage>((a, b) => a.Key == b.Key));
You might be able to get away with the <GalleryImage>, but I'm not sure if the compiler could infer the type (don't have access to it right now.)And in an additional extension method:
public static class IEnumerableExtensions { public static IEnumerable<TValue> Distinct<TValue>(this IEnumerable<TValue> @this, Func<TValue, TValue, bool> comparer) { return @this.Distinct(new ThrowAwayEqualityComparer<TValue>(comparer); } private class ThrowAwayEqualityComparer... }
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