Preview config missing for csharp projects

When running a csharp pipeline, I get this error:
```
[Pipeline] {
[Pipeline] container
[Pipeline] {
[Pipeline] sh
[preview] Running shell script
+ make preview
make: *** No rule to make target `preview'.  Stop.
[Pipeline] }
[Pipeline] // container
```

It appears there is no `preview` folder in the `csharp` draft pack. I'm guessing there should be.