Maybe I'm seeing things..

In an attempt to turn a date with a format of "mm/dd/yyyy hh:mm:ss PM" into military time, the following replacement of a row value does not seem to take. Even though I am sure I have done this before (with column values other than dates). Is there some reason that row["adate"] would not accept a value assigned to it in this case?

DateTime oos = DateTime.Parse(row["adate"].ToString());

row["adate"] =  oos.Month.ToString() 
              + "/" 
              + oos.Day.ToString() 
              + "/" 
              + oos.Year.ToString() 
              + " " 
              + oos.Hour.ToString() 
              + ":" 
              + oos.Minute.ToString();