using System;

public class Program

{

    public static void Main()

    {

        // Use DateTime.TryParse when input is valid.

        string input = "2019-05-20";

        DateTime dateTime;

        if (DateTime.TryParse(input, out dateTime))

        {

            Console.WriteLine(dateTime);

        }

        else

        {

            Console.WriteLine("Invalid"); // <-- Control flow goes here

        }

​

        // Use DateTime.TryParse when input is 9 July 1pm .

        string yourInput = "9 July 1pm";

        DateTime dateTime2;

        if (DateTime.TryParse(yourInput, out dateTime2))

        {

            Console.WriteLine(dateTime2);

        }

        else

        {

            Console.WriteLine("Invalid"); // <-- Control flow goes here

        }

        // Use DateTime.TryParse when input is 9 July 1pm .

        string badInput = "9 July 1pm CET";

        DateTime dateTime3;

        if (DateTime.TryParse(badInput, out dateTime3))

        {

            Console.WriteLine(dateTime3);

        }

        else

        {

            Console.WriteLine("Invalid"); // <-- Control flow goes here

        }

    }

}