Ever heard of property-based testing? Carl and Richard talk to Mark Seemann about doing property-based testing with F#. As Mark explains, functional programming techniques work especially well for property-based testing, allowing you to define parameters (properties) that will generate ranges of values to test against. The conversation digs into tooling, specifically FsCheck, an open source library for doing property-based testing in F#. If you'd rather work in C#, Mark's project AutoFixture can do similar work in that language. But Mark talks up the advantages of F# from a functional perspective, creating very terse, easy to read tests. Check it out!