using System;

public class Program

{

    public static void Main()

    {

        var cases = new string[] {

            "2020-06-02T13:15:29",

            "2020-06-02T13:15:29+00:00:00",

            "2020-06-02T13:15:29Z",

            "2020-06-02T13:15:29 + 00",

        };

        foreach(var c in cases){

            try{

                var dto = DateTimeOffset.Parse(c);

                Console.WriteLine(dto);

            }

            catch (Exception x){

                Console.WriteLine(x);

            }

        }

    }

}