I have the following f# code:

```
let mutable argNum = 0
let cmdArgs = System.Environment.GetCommandLineArgs()

for arg in cmdArgs do
    printfn "arg %d : %s" argNum arg
    match argNum with
    | 1 -> pmID      <- System.Int32.Parse arg 
    | 2 -> startDate <- System.DateTime.Parse arg
    | 3 -> endDate   <- System.DateTime.Parse arg
    | _ -> ()
    argNum <- argNum + 1

```

for the date parameters, the argument comes in the form: "1-1-2011", so "M-D-YYYY"
when i write the dates into the xml serializer, I get the following format:

```
1/1/2011 12:00:00 AM

```

I'd like to remove the Time piece completely. What's the best way to do this?