How do I sort a list with more than 1 item? I can only get it to sort the list with 1 item

Question

The code looks like this and as I mentioned in my title, the code works but only with 1 item but I want it to search the list with an additional item.

This is my functional code (1 item named irl1):

private void FilterContacts(string filter)
{
    EmployeeList.BeginRefresh();

    if (string.IsNullOrWhiteSpace(filter)) {
        System.Diagnostics.Debug.WriteLine("if1");
        EmployeeList.ItemsSource = ourPitems;
    } else {
        System.Diagnostics.Debug.WriteLine("else2");
        EmployeeList.ItemsSource = ourPitems.Where(x => x.irl1.ToLower ().Contains (filter.ToLower ()));
    }

    EmployeeList.EndRefresh ();
}

and what I am trying to do does not work:

EmployeeList.ItemsSource = 
    ourPitems.Where(
        x => x.ourMadeUpNationality.ToLower(), 
        oem => oem.irl1.ToLower().Contains(filter.ToLower())
    );

and while I'm at it, I tried to make the list refresh when I drag it up, but it just keeps loading, when I search in my list it updates. What I have tried to do is this but It does not seem to work.

public StartPage()
{
    InitializeComponent();

    //add the refresh function here.

    EmployeeList.BeginRefresh();
    // this is for the search list.
    sbSearch.TextChanged += (sender2, e2) => FilterContacts(sbSearch.Text);
    // this is for the search list.
    sbSearch.SearchButtonPressed += (sender2, e2) => FilterContacts(sbSearch.Text);

    EmployeeList.EndRefresh();
}

Answer 1

EmployeeList.ItemsSource = ourPitems.Where（tk => tk.irl1.ToLower（）。Contains（filter.ToLower（））&& tk.ourMadeUpNationality ==“ Test1”）;