String was not recognized as a valid DateTime.

[lakshmiprasad]

sir,

 DateTime dat1 = Convert.ToDateTime(txtstarttime9.Text);
 DateTime dat2 = Convert.ToDateTime(txtendtime9.Text);
   TimeSpan ts = dat2.Subtract(dat1);
 txtnoofhoursupdate9.Text = ts.ToString();

[ankit20071991]

Can you provide me with the value which you are entering in textbox.