从配置文件中获取设置

Question

我正在尝试在 ASP.NET Boilerplate 中设置 MailKit 以发送电子邮件，但尽管我在app.config文件中添加了设置，但我仍然收到此异常。

发送电子邮件的代码：

_emailSender.Send(

    to: "*****@gmail.com",

    subject: "You have a new task!",

    body: $"A new task is assigned for you: <b>Create doFramework</b>",

    isBodyHtml: true

);

收到异常：

{Abp.AbpException: 'Abp.Net.Mail.DefaultFromAddress' 的设置值为 null 或为空！在 Abp.Net.Mail.EmailSenderConfiguration.GetNotEmptySettingValue(String name) in D:\Github\aspnetboilerplate\src\Abp\Net\Mail\EmailSenderConfiguration.cs:line 44 at Abp.Net.Mail.EmailSenderBase.NormalizeMail(MailMessage mail)在 D:\Github\aspnetboilerplate\src\Abp\Net\Mail\EmailSenderBase.cs:line 96 at Abp.Net.Mail.EmailSenderBase.Send(MailMessage mail, Boolean normalize) in D:\Github\aspnetboilerplate\src\Abp \Net\Mail\EmailSenderBase.cs:line 73 at TaskManagmentApp.Tasks.TaskAppService.GetAll(GetAllTasksInput input) in C:\Users\Dopravo\source\repos\doFramework\SampleProjects\TaskManagmentApp\src\TaskManagmentApp.Application\Services\TaskAppService .cs:第 36 行，位于 Castle.Proxies.Invocations。

app.config文件：

<configuration>

  <runtime>

    <gcServer enabled="true"/>

  </runtime>

  <appSettings>

    <add key="Abp.Net.Mail.DefaultFromAddress" value="[e-mail]"/>

    <add key="Abp.Net.Mail.DefaultFromDisplayName" value="Lutfi Kaddoura"/>

  </appSettings>     

</configuration>