This working code triggers:

FS0760: It is recommended that objects supporting the IDisposable interface are created using the syntax 'new Type(args)', rather than 'Type(args)' or 'Type' as a function value representing the constructor, to indicate that resources may be owned by the generated value

open System.Media
open System.IO
let s = [|1uy; 2uy|]
let sp = new SoundPlayer(MemoryStream s) 
sp.PlaySync()

After applying suggested change in Visual Studio the result is:

open System.Media
open System.IO
let s = [|1uy; 2uy|]
let sp = new SoundPlayer(new MemoryStream s) 
sp.PlaySync()

This code is broken and gives compile error:

error FS0010: Unexpected symbol ')' in expression

The relevant source is here:
CodeFix/AddNewKeywordToDisposableConstructorInvocation.fs

Microsoft Visual Studio Community 2017
Version 15.9.10
VisualStudio.15.Release/15.9.10+28307.557
Microsoft .NET Framework
Version 4.7.03190