Need help on index was outside..

Question

this is part of my code ,though the program  run(not really correct
)also have this message "Index was outside the bounds of the array"
using (StreamReader sr = new StreamReader("Date.txt"))
{
String line;
while ((line = sr.ReadLine()) != null)
{
Date mydate = new Date();
int monthTemp;
int dayTemp;
int yearTemp;
String[] str = line.Split(' ');
Int32.TryParse(str[0], out monthTemp);
mydate.Month = monthTemp;
Int32.TryParse(str[1], out dayTemp);
mydate.Day = dayTemp;
Int32.TryParse(str[2], out yearTemp);
mydate.Year = yearTemp;