public static async Task ReportError(string feedbackText, string qqText) { const string to = "*****@*****.**"; const string subject = "《饥荒百科全书 by tpxxn》意见与建议"; var body = feedbackText; if (qqText != null) { body += " QQ:" + qqText; } await CallExternalContent.OpenEmailComposeAsync(to, subject, body); }