f#

在 C# 中，我有以下接口定义：

using System.Collections;

public interface ISuggestionProvider
{

    #region Public Methods

    IEnumerable GetSuggestions(string filter);

    #endregion Public Methods

}

在 F# 中，我试过这样做：

type ISuggestionProvider = 
    abstract member GetSuggestions: string -> seq<'T>

type DiagnosisProvider () = 
   interface ISuggestionProvider with
    member this.GetSuggestions s =[ "one";  "two"; "three"] |> Seq.cast

但是当这被读回 C# 时，我得到：

public IEnumerable<T> GetSuggestions<T>(string value)
 {
        throw new NotImplementedException();
 }

我需要的是将其读回为：

    public System.Collections.IEnumerable GetSuggestions(string filter)
    {
        return _method(filter);
    }

简而言之，我如何返回一个无类型的 IEnumerable 而不是 IEnumerable<'T> ???

在此先感谢您的帮助。

回答

open System.Collections

type ISuggestionProvider = 
    abstract member GetSuggestions: string -> IEnumerable

type DiagnosisProvider () = 
   interface ISuggestionProvider with
      member this.GetSuggestions s =
          [ "one";  "two"; "three"]
          :> IEnumerable