Not Recognized as a valid datetime. Unknown word starting at index 0

Question

I am trying calculate the timespan between two listbox. This my code..

for (int x = 0; x < listBox1.Items.Count; x++)
{
    DateTime z = DateTime.Parse(listBox2.Items.ToString());
    DateTime c = DateTime.Parse(listBox3.Items.ToString());
    TimeSpan w = c - z;
}

Answer 1

Maybe you need some thing like this:

for (int x = 0; x < listBox1.Items.Count; x++)
{
    DateTime z = DateTime.Parse(listBox2.Items[x].ToString());
    DateTime c = DateTime.Parse(listBox3.Items[x].ToString());
    TimeSpan w = c.Subtract(z);
} 

Also, your ListBoxes items should be the same count