dotnet-core/release-notes/3.0/preview/api-diff/preview4/3.0-preview4_System.Linq.md

System.Linq

 namespace System.Linq {
     public static class Enumerable {
+        public static IEnumerable<ValueTuple<TFirst, TSecond>> Zip<TFirst, TSecond>(this IEnumerable<TFirst> first, IEnumerable<TSecond> second);
     }
     public static class Queryable {
+        public static IQueryable<ValueTuple<TFirst, TSecond>> Zip<TFirst, TSecond>(this IQueryable<TFirst> source1, IEnumerable<TSecond> source2);
     }
 }