diff --git a/Sanchime.Functional/Extensions/IEnumerable.cs b/Sanchime.Functional/Extensions/IEnumerable.cs
index f60e8a8..c2ead6e 100644
--- a/Sanchime.Functional/Extensions/IEnumerable.cs
+++ b/Sanchime.Functional/Extensions/IEnumerable.cs
@@ -109,8 +109,6 @@ public static class IEnumerableExtension
         => source.SelectMany(x => x);
 
 
-    private static IEnumerable<T> List<T>(T t)
-    {
-        throw new NotImplementedException();
-    }
+    private static IEnumerable<T> List<T>(params T[] list)
+        => list.ToImmutableList();
 }