How do I activate Timespan with a set time

Question

I wanted to do a Timespan set, like this from 8:00 to 8:10 and after 16:00 to 16:10 he keeps sending a message that I created, outside of these times is not to appear.

var startTimeSpan = TimeSpan.Zero;
var periodTimeSpan = TimeSpan.FromMinutes(1);
{
    var timer = new System.Threading.Timer((e) =>
    {
        MessageBox.Show("Teste de Mensagem");
    },
    null, startTimeSpan, periodTimeSpan);
}

Ae I wanted to put this condition on some if.

Answer 1

from what I understand you want this:

 var timer = new System.Threading.Timer((e) =>
                {
                    if ((DateTime.Now.TimeOfDay >= System.TimeSpan.Parse("08:00:00.000") && DateTime.Now.TimeOfDay <= System.TimeSpan.Parse("08:10:00.000")) 
|| (DateTime.Now.TimeOfDay >= System.TimeSpan.Parse("16:00:00.000") && DateTime.Now.TimeOfDay <= System.TimeSpan.Parse("16:10:00.000")))
                        {
                            MessageBox.Show("Teste de Mensagem");
                        }
                    },
                    null, startTimeSpan, periodTimeSpan);