using System;
using System.Collections.Generic;
using System.Linq;
 
public class Test {
    public static void Main() {
        var flunf = 98765432f;
 
        var sortedList = new List<double> {
            flunf + 1, 
            flunf + 3, 
        };
        var valueToInsert = flunf + 2;
        var indexOfInsert = sortedList.TakeWhile(e => e < flunf + 2).Count();
        sortedList.Insert(indexOfInsert, valueToInsert);
 
        var stayedSorted = sortedList.SequenceEqual(sortedList.OrderBy(e => e));
        Console.WriteLine(stayedSorted); // prints 'False'              
    }
}

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