using System;
using static System.Console;
public class Program {
public static void Main() => WriteLine(CalcularDataEntrega("04/07/2016")); //não está em formato brasilerio, mas é só questão de configuração.
private static string CalcularDataEntrega(string dataEntrada) => DateTime.Parse(dataEntrada).AddDays(28).ToString();
}
//https://pt.stackoverflow.com/q/122142/101
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