+ Convert DateTime to a formatted string and get DateTime by a formatted string. +Strip non-ASCII characters

DateTimeToStringConvert.cs

using System;
using System.Globalization;
using System.Text.RegularExpressions;

public class Test
{
    public static void Main()
    {
        // NOTE: This string contains non-ASCII characters
        string dateTimeString = "21‎-‎10‎-‎2014‎ ‎15‎:‎40‎:‎30";
        
        // Strip non-ASCII characters
        dateTimeString = Regex.Replace(dateTimeString, @"[^\u0000-\u007F]", string.Empty);

        string inputFormat = "dd-MM-yyyy HH:mm:ss";
        string outputFormat = "yyyy-MM-dd HH:mm:ss";
        var dateTime = DateTime.ParseExact(dateTimeString, inputFormat, CultureInfo.InvariantCulture);
        string output = dateTime.ToString(outputFormat);

        Console.WriteLine(output);
    }
}