C# 7.0 Value Tuple compile error?

asp.net linq-to-entities expression-trees c#-7.0 valuetuple

It works for me, create a tuple first and convert it to a ValueTuple：

var post = iPostService.GetAll().           Select(x => new Tuple<string, string>(x.Title, x.Author).ToValueTuple())

asp.net linq-to-entities expression-trees c#-7.0 valuetuple

Finally, I found out what wrong with my code:

I am using deferred execution so data won't load from the database when the constructor executed.
The solution is to add conversion operators before creating instance command.

Hope it works with your code.

CodeHunter