using System;

​

public static class StringExtensions {

    public static bool ToBool(this string value){

        return value.ToLower() == "yes";

    }

    public static DateTime ToDate(this string value){

        return DateTime.TryParse(value, out DateTime result) ? result : DateTime.MinValue;

    }   

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("{\"Yes\".ToBool()} Should return True. Actual value: " + "Yes".ToBool());

        Console.WriteLine("{\"No\".ToBool()} Should return False. Actual value: " + "No".ToBool());

        Console.WriteLine("{\"12-Oct-2022\".ToDate()} Should return 12-Oct-2022. Actual value: " + "12-Oct-2022".ToDate().ToString("dd-MMM-yyyy"));

        Console.WriteLine("{\"\".ToDate()} Should return 01-Jan-0001. Actual value: " + "".ToDate().ToString("dd-MMM-yyyy"));

    }

}