NancyFx/Nancy — pull request #547 by prabirshrestha (2012-03-09 00:52:27+00:00)
Title: Conditional e-tags (#183)

Here are two extension methods for ETags and Last-Modified based on http://simoncropp.com/conditionalresponseswithnancyfx

```csharp
using Nancy.Caching;

public class SampleModule : NancyModule
{
public SampleModule()
{
this.CheckForIfNonMatch();
this.CheckForIfModifiedSince();

Get["/img"] = x => Response.AsImage("pic.png");
}
}
```

I added this extension method under `Nancy.Caching` namespace