using System;
public class Test
{
public static void Main()
{
DateTime hoje = DateTime.Now;
DateTime obtida = DateTime.Parse("05/04/2017");
TimeSpan diferenca = hoje.Subtract(obtida);
double dias = diferenca.TotalDays;
System.Console.WriteLine("Diferença de dias:{0}", dias);
//ou
System.Console.WriteLine("Diferença de dias:{0}", (hoje - obtida).TotalDays);
}
}
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