I have to compare HH:MM(hour and minutes). How can i do so?

public int CompareTime(string t1, string t2)
{

int i = -1;

int hr1 = Convert.ToInt32(t1.Split(':')[0]);
int hr2 = Convert.ToInt32(t2.Split(':')[0]);

int min1 = Convert.ToInt32(t1.Split(':')[1]);
int min2 = Convert.ToInt32(t2.Split(':')[1]);

if (hr2 == hr1)
{
if (min2 >= min1)
{
i = 1;
}
}

if (hr2 > hr1)
{
i = 1;
}

return i;
}