How do I subtract 1 hour from DATETIME string using timespan instance

[JonDavid]

CODE:
DateTime coursestatusdat e = DateTime.MinVal ue;
if (courseRow["coursestatusda te"].ToString() != string.Empty)
{
coursestatusdat e = DateTime.Parse( courseRow
["coursestatusda te"].ToString());
//TODO: Convert coursestatusdat e to CST
DateTime courseStatusDat eCentralTime =
coursestatusdat e.Add(System.Ti meSpan.FromHour s(-1));
}

I need to preserve the time for coursestatusdat e, and I need courseStatusDat eCentralTime to reflect : coursestatusdat e - 1 hour

[JonDavid]

I found the problem

I was almost there. All I had to do was uncomment my declaration, and removed the DATE TIME from my conversion. ...all is well.

private void Update_Course(D ataRowView courseRow, DataRow studentRow, DataView courseDV)
{
DateTime courseStatusDat eCentralTime = DateTime.MinVal ue;
DateTime coursestatusdat e = DateTime.MinVal ue;

if (courseRow["coursestatusda te"].ToString() != string.Empty)
{
coursestatusdat e = DateTime.Parse( courseRow["coursestatusda te"].ToString());
//TODO: Convert coursestatusdat e to CST
courseStatusDat eCentralTime = coursestatusdat e.Add(System.Ti meSpan.FromHour s(-1));
}

[GaryTexmo]

http://msdn.microsoft.com/en-us/library/system.datetime.aspx

I think you need the AddHours method.

            DateTime now = DateTime.Now;
            DateTime nowMinusOne = now.AddHours(-1);

            Console.WriteLine(now.ToString());
            Console.WriteLine(nowMinusOne.ToString());

By the way, I notice you're talking about timezones in there... a handy tip if you're going to do any compares. There's a ToUniversalTime method off a DateTime object that will convert a time to universal time. I don't now if you know about it already, but I discovered it recently so maybe it will save you some trouble in the future :)

*Edit: Looks like you got got it another way, nice work!