以异步方式调用同步方法?

正如评论中提到的,我不认为异步调用有什么帮助。在另一个线程中运行它并等待(根据您的“what is the property way…”问题)确实使用了与同步调用和等待一样多的资源。

System.DirectoryServices.Protocols 例如 LdapCollection 使用较旧的APM(异步编程模型)样式(例如。 BeginSendRequest / EndSendRequest ).

您可以使用 TaskFactory<TResult>.FromAsync ,这将是将这些类与async一起使用的“正确方法”。另见 Interop with Other Asynchronous Patterns and Types .

Task<T> 异步方法:

public static async Task<DirectoryResponse> SendRequestAsync(this LdapConnection conn, string target, string filter,
    SearchScope searchScope, params string[] attributeList)
{
    if (conn == null)
    {
        throw new NullReferenceException();
    }
    var search_request = new SearchRequest(target, filter, searchScope, attributeList);
    var response = await Task<DirectoryResponse>.Factory.FromAsync(
        conn.BeginSendRequest,
        (iar) => conn.EndSendRequest(iar),
        search_request,
        PartialResultProcessing.NoPartialResultSupport,
        null);
    return response;
}