fsharp/fsharpx — comment on commit 3b7025c46e4a5b11d72d0e013c9d5d89384b940d
File:  line 0
By mausch:

Prelude has Double.parse / parseWithOptions, seems to be exactly what you want: https://github.com/fsharp/fsharpx/blob/master/src/FSharpx.Core/Prelude.fs#L80