DistinctBy< TSource, TKey >() [1/2]

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

inlinestatic

Definition at line 655 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_2(typeof(TSource), typeof(TKey)), source.Expression, Expression.Quote(keySelector)));
    }

References System.Linq.Error.ArgumentNull(), System.Linq.Expressions.Expression< TDelegate >.Call(), System.Linq.CachedReflectionInfo.DistinctBy_TSource_TKey_2(), System.Linq.keySelector, System.Linq.Expressions.Expression< TDelegate >.Quote(), and System.Linq.source.