using System;

​

public class Program

{

    public static void Main()

    {

        string iconClass = "asc";

        var x = SortedInAscendingOrder(iconClass);

        Console.WriteLine($"for asc equals: {x}");

        iconClass = "desc";

        x = SortedInAscendingOrder(iconClass);

        Console.WriteLine($"for desc equals: {x}");

        iconClass = "xxx";

        x = SortedInAscendingOrder(iconClass);

        Console.WriteLine($"for xxx equals: {x}");

    }

​

    public static bool SortedInAscendingOrder(string test) => test.Contains("asc") || (test.Contains("desc") ? false : throw new Exception("None of icon-caret-up and icon-caret-down are present in sort order indicator icon"));

    public static bool SortedInAscendingOrderNormal(string test)

    {

        if (test.Contains("asc"))

        {

            return true;

        }

        else if (test.Contains("desc"))

        {

            return false;

        }

        else

        {

            throw new Exception("None of icon-caret-up and icon-caret-down are present in sort order indicator icon");

        }

    }

}