Language Extensibility Presentation.

This solution contains a sample project that downloads information about HCPCS codes from a web service.
There are four different implementations of this algorithm.

1) SerialDescriber - Simplest possible serial implementation
2) OldSchoolDescriber - Uses .NET 2.0 style Begin and End methods for async programming
3) ManualAsyncDescriber - Uses .NET 3.5 Task objects for async programming
4) AsyncAwaitDescriber - Uses .NET 4.5 async and await keywords for async programming.

Also included is WebServiceTypeProvider.fsx. This is an F# script that demonstrates F# 3.0's Type providers.