R – F# on mono in leopard. Seq.cast error

According to the Sept 2008 CTP Release Notes:

The F# library is split into two components. FSharp.Core.dll: Contains the core F# libraries, which will be stabilized and versioned infrequently. FSharp.PowerPack.dll: Contains additional useful F# libraries and tools which will version more frequently, and allow continued innovation on top of the core F# language and libraries.

Some methods in the Seq module were moved into the FSharp.PowerPack assembly, so you can only get those methods by doing the following:

• If you're using Visual Studio, open your Solution Explorer, right-click on the project file, choose "Add Reference", and add "FSharp.PowerPack.dll".

• If you're using a script file or fsi, then type #r "FSharp.PowerPack";; to load the assembly.

Now you should be able to call Seq.generate_using.

Your code has several issues. First of all, your constructor for the SKYPE4COM class appears to be recursive (?!), which is going to cause a stack overflow if you try to create an instance. Secondly, the error that you're receiving is because you are using the new operator, but you haven't completed the call to the constructor (i.e. you need to apply the constructor using parentheses: let aSkype = new SKYPE4COM()). Even then, though, you've got another issue because your type doesn't expose a CurrentUserProfile property, so your code still won't work.

Try something like this:

open SKYPE4COMLib

let getMood() =
  SkypeClass().CurrentUserProfile.MoodText