DelimitedFieldBuilder 是内部，因此您在使用该方法时会遇到困难.但是， AddField(String)返回一个 DelimitedFieldBuilder ，因此您可以使用它.

The constructors of DelimitedFieldBuilder are internal so you'll run into difficulty with your approach. However AddField(String) returns a DelimitedFieldBuilder, so you might be able to use that.

创建自己的类 MyFieldBuilder 可能会更容易，该类调用标准的 AddField(String).

It might be easier to make your own class MyFieldBuilder which calls the standard AddField(String).