DistinctBy< TSource, TKey >() [2/2]

static IQueryable< TSource > System.Linq.Queryable.DistinctBy< TSource, TKey > ( this IQueryable< TSource > source, Expression< Func< TSource, TKey > > keySelector, IEqualityComparer< TKey >? comparer )

inlinestatic

Definition at line 669 of file Queryable.cs.

    {
        if (source == null)
        {
            throw Error.ArgumentNull("source");
        }
        if (keySelector == null)
        {
            throw Error.ArgumentNull("keySelector");
        }
        return source.Provider.CreateQuery<TSource>(Expression.Call(null, CachedReflectionInfo.DistinctBy_TSource_TKey_3(typeof(TSource), typeof(TKey)), source.Expression, Expression.Quote(keySelector), Expression.Constant(comparer, typeof(IEqualityComparer<TKey>))));
    }

References System.Linq.Error.ArgumentNull(), System.Linq.Expressions.Expression< TDelegate >.Call(), System.comparer, System.Linq.Expressions.Expression< TDelegate >.Constant(), System.Linq.CachedReflectionInfo.DistinctBy_TSource_TKey_3(), System.Linq.keySelector, System.Linq.Expressions.Expression< TDelegate >.Quote(), and System.Linq.source.