ShowList funtion should return an object of List, currently does not return anything

public List ShowList(Employee employees)
{
foreach (var employee in employees)
{
var expectedSalary = employees.CalculateExpectedSalary();
var experience = employees.GetExperience();
var githubLink = employees.GetGithubLink();
var data =
new[] {
expectedSalary,
experience,
githubLink
};

    render(data);
}

}