在ASP.NET Web API中如何实现示例.xlsx文件下载功能？

我需要在ASP.NET Web API中实现示例.xlsx文件的下载功能，目前已尝试以下两种实现方法：

方法一 #

public HttpResponseMessage DownloadExcelFile()
{
    string filePath = Directory.GetCurrentDirectory() + "/Modules/SampleFiles/sample3.xlsx";

    
    HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
    response.Content = new StreamContent(new FileStream(filePath, FileMode.Open));
    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
    {
        FileName = "sample3.xlsx"
    };
    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

    return response;
}

方法二 #

public HttpResponseMessage DownloadExcelFile()
{
    string filePath = Directory.GetCurrentDirectory() + "/Modules/SampleFiles/sample3.xlsx";
    
    HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
    response.Content = new StreamContent(new FileStream(filePath, FileMode.Open));
    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
    {
        FileName = "sample3.xlsx"
    };
    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

    return response;
}

内容的提问来源于stack exchange，提问作者Krunal Thakor