需求2

#1  System.Data.OleDb.OleDbException (0x8000FFFF): 没有可用的错误消息，结果代码: E_UNEXPECTED(0x8000FFFF)。

#2

CurrentPrincipal = Thread.CurrentPrincipal;

foreach (string role in secCtl.Roles) { if (CurrentPrincipal.IsInRole(role)) { // They are in a role, so break out of loop var principal = ClaimsPrincipal.Current; PrintPrincipal(principal); break; } 这句代码什么意思，默认的role字符串有哪些 怎么查看到

 

#3  适用于 WPF 和 .NET 上的 Windows 窗体的桌面指南 | Microsoft Learn

 

#4 https://chrome.google.com/webstore/detail/google-translate/aapbdbdomjkkjkaonfhkkikfgjllcleb/related?hl=zh-CN

 

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