Detecting switches

I am getting confused here:

```
public class Options
{
[Option('c', "create", Required = false, HelpText = "Creates an empty CSV. Eg: -c \".\\File.csv\"")]
public string EmptyCsvFilePath { get; set; }
[Option('x', "clm", Required = false, HelpText = "Import history from CLM Explorer. Eg: -x \".\\File.csv\"")]
public string ClmExplorerHistoryPath { get; set; }
[Option('h', "hist", Required = false, HelpText = "Import generic history. Eg: -h \".\\File.csv\"")]
public string GenericHistoryPath { get; set; }
}
```

All these switched are optional. But, if the switch is used then the values must be provided.

How do I handle this? At the moment the paths are null if either the switch is not provided or no path is provided. But it is only an issue if the switch was provided and no path.

if a switch is provided, it should have a value.

Using latest stable release.

Please help me. Thanks.