F# Equivalent of Destructor

Question

I am translating a C# class that wraps an unmanaged library to F#. I have run into the seemingly simple problem of rewriting the destructor that follows.

class Wrapper {

    // P/Invoke ellided

    private SomeType x;

    public Wrapper() {
        x = new SomeType();
        Begin();
    }

    public ~Wrapper() {
        End();
    }

The simplified F# code I have at this point is as follows:

type Wrapper() =
  [<Literal>]
  static let wrappedDll = "Library.dll"

  [<DllImport(wrappedDll , EntryPoint = "Begin")>]
  static extern void Begin()

  [<DllImport(wrappedDll , EntryPoint = "End")>]
  static extern void End()

  let x = new SomeType()

  do
    Begin()

How can I modify this F# code to have the same behaviour? My search for F# destructor turned up no results in the books I have or on the web.

Thank you.

Answer 1

Have you tried looking for F# finalizer?

override x.Finalize() = ...