c# - Getting "Tuple element name is inferred. Please use language version 7.1 or greater to access an element by its inferred name." -


we have following code has been working fine in our uwp app until today after updated visual studio 2017 latest 15.3.

private void test() {     var groups = new list<(guid key, ilist<(string, bool)> items)>();      var items = new list<(string, bool)>     {         ("a", true),         ("b", false),         ("c", false)     };     var group = (guid.newguid(), items);      groups.add(group); }

there no error message in output window

tuple element name 'items' inferred. please use language version 7.1 or greater access element inferred name.

any idea why , how fix this?

project->properties->build->advanced->language version->c# latest minor version


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