Obsolete attribute error is not taken into account in prop setters that can be included in methods which are not constructors #16952

open System

type JsonSerializerOptions() =
    [<Obsolete("This is bad")>]
    member val DefaultOptions = false with get, set
    member val UseCustomOptions = false with get, set
    member this.With() = this
    
let options = JsonSerializerOptions()
let options2 =
    options
        .With(DefaultOptions = true)
        .With(UseCustomOptions = false)