Asp.net post multipart/form-data 如何提交同名参数？

Question

如下三个参数的name="ABC"是一样的：
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Content-Disposition: form-data; name="ABC"

01
-----------------------------7e21e335d0b4e
Content-Disposition: form-data; name="ABC"

02
-----------------------------7e21e335d0b4e
Content-Disposition: form-data; name="ABC"

03