using System;
using System.Linq;
using System.Text.Json;

var names = new[] {
    "Max", "Boris", "Alex", "Tom"
};

//first method
var names1 = names
    .OrderByDescending(s => s);
//names1 is {Tom, Max, Boris, Alex}  

//second method
var names2 =
    from s in names
    orderby s descending
    select s;
//names2 is {Alex, Boris, Max, Tom} 

Console.WriteLine(JsonSerializer.Serialize(names1));
Console.WriteLine(JsonSerializer.Serialize(names2));