Built-in COM has been disabled via a feature switch.

.net 6.0 开始默认关闭com组件

 

使用时会出现以下信息

Built-in COM has been disabled via a feature switch. See https://aka.ms/dotnet-illink/com for more

 

 

解决方案

在项目添加以下代码

 <PropertyGroup>

<BuiltInComInteropSupport>true</BuiltInComInteropSupport>

</PropertyGroup>