C# override member

[nojaf]

To reproduce:

• Add <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />

module X.Y.Z

open Microsoft.FSharp.Reflection
open Newtonsoft.Json
open System

[<Sealed>]
type EnumConverter () =
    inherit JsonConverter ()
    let fail s = failwithf "Unable to parse JSON data - %s" s
    override __.WriteJson(writer, value, serialiser) =
        ()
    override __.ReadJson(reader, objectType, existingValue, serialiser) = TimeSpan.Zero
    override __.CanConvert objectType = false

Errors:

Errors in A.fs:
(18,4--19,10): Could not parse:

type A =
    new: unit -> A
    JsonConverter.WriteJson(writer: JsonWriter, value: obj, serializer: JsonSerializer) : unit

(20,4--20,87): Could not parse:

type A =
    new: unit -> A
    JsonConverter.ReadJson(reader: JsonReader, objectType: Type, existingValue: obj, serializer: JsonSerializer) : obj

(21,4--21,45): Could not parse:

type A =
    new: unit -> A
    JsonConverter.CanConvert(objectType: Type) : bool

A.fsi:

module X.Y.Z

open Microsoft.FSharp.Reflection
open Newtonsoft.Json
open System

[<Sealed>]
type EnumConverter =
    new: unit -> EnumConverter
    inherit JsonConverter