FormatException: String '2020-12-31T04:00:00.000Z"' was not recognized as a valid DateTime. site:stackoverflow.com code example

Example: System.FormatException: 'String '09-03-2020' was not recognized as a valid DateTime.'

this.Text="22/11/2009";

DateTime date = DateTime.ParseExact(this.Text, "dd/MM/yyyy", null);