MailKit.imap文件夹:在类型中找不到方法搜索

在调试过程中,我把范围缩小到搜索方法。我试过Mailkit2.0.6、2.7.0和.NET4.5。

有人知道这里怎么了吗?

窗户

client.Inbox.Search(SearchQuery.SubjectContains("Automation Test Schedule Subject: 6/19/2020 4:57:04 PM")); {11234} Count: 1 IsReadOnly: false SortOrder: Ascending Validity: 0 Results View: Expanding the Results View will enumerate the IEnumerable

client.Inbox.Search(SearchQuery.SubjectContains("Automation Test Schedule Subject: 6/19/2020 5:36:12 PM")); Method 'Search' not found in type 'MailKit.IMailFolder'.

代码

using (var client = new ImapClient())
    {
        // connect to email client
        client.Connect(RandomOutlookAccnt);
        client.Authenticate(EmailAddress, Password);
        client.Inbox.Open(FolderAccess.ReadOnly);

    client.Idle(cts.Token);

    var query = SearchQuery.SubjectContains(emailSubject);

    // search unique ids of the emails in inbox 
    var uids = client.Inbox.Search(query);
    var items = client.Inbox.Fetch(uids, MessageSummaryItems.UniqueId | MessageSummaryItems.BodyStructure);


    . . . other stuff

}