C#/.NET开发问题

Sending email with attachments from C#, attachments arrive as Part 1.2 in Thunderbird(从 C# 发送带有附件的电子邮件,附件在 Thunderbird 中作为第 1.2 部分到达)
Attach a file from MemoryStream to a MailMessage in C#(将文件从 MemoryStream 附加到 C# 中的 MailMessage)
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required?(SMTP 服务器需要安全连接或客户端未通过身份验证.服务器响应是:5.5.1 需要身份验证?) - IT屋-程序员软件开发
Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required(Gmail 错误:SMTP 服务器需要安全连接或客户端未通过身份验证.服务器响应是:5.5.1 Authentication
Mono on Raspberry Pi(Raspberry Pi 上的单声道)
Better way to show error messages in async methods(在异步方法中显示错误消息的更好方法)
How to open a child windows under parent window on menu item click in WPF?(如何在WPF中单击菜单项时在父窗口下打开子窗口?)
Is it possible to overload the ShowDialog method for forms and return a different result?(是否可以重载表单的 ShowDialog 方法并返回不同的结果?)
Completely Modal WPF Window?(完全模态 WPF 窗口?)
WPF modal progress window(WPF 模态进度窗口)
Can#39;t set DialogResult in WPF(无法在 WPF 中设置 DialogResult)
Difference between .Owner property and ShowDialog(IWin32Window owner)?(.Owner 属性和 ShowDialog(IWin32Window 所有者)之间的区别?)