Assemblies written in C# and other .NET languages can be directly accessed from F#. This makes F# an amazingly powerful language given the huge number of libraries available. This section describes how to use various .NET constructs from F#. A working knowledge of C# or another .NET language is assumed.

Longer examples of interoperability can be found in the samples that come with the F# compiler.

• The Basics
• Implementing Interfaces
• Type Inference and Overloading
• Boxing to System.Object and back
• Upcasts and Downcasts
• Nullness

The Basics

Types.