How can I get today's date in `M/d/yyyy` format irrespective of system format of date using C#?

```
DateTime.Now.Tostring('M/d/yyyy')

```

is working only if the system date is in format `dd/MM/yyyy` or `M/dd/yyyy` but is not working in case `yyyy-MM-dd` format.

Eg:

if system date is `2013-06-26` then `DateTime.Now.Tostring('M/d/yyyy')` is converting the date into `06-26-2013` but not in `06/26/2013`