如何从ViewEngineResult获取呈现的PartialView

ViewEngineResult result = View("PartialViewName");

var partialView = result.View;

var viewContext = new ViewContext();
var viewData = new ViewDataDictionary(viewContext, new EmptyModelMetadataProvider());
var tempData = new TempDataDictionary(viewContext, new SessionStateTempDataProvider());

using (var writer = new StringWriter())
{
    var viewResult = result.View.RenderAsync(new ViewContext(viewContext, result.View, viewData, tempData, writer, new HtmlHelperOptions()));
    viewResult.GetAwaiter().GetResult();
    var renderedPartialView = writer.GetStringBuilder().ToString();
}