将 .net 代码添加到 asp webforms 网站，无法在 .dll 文件中引用命名空间

Question

I have some problem with my first task . i made a asp.net web form app i add some dll libraries in my "webform1.aspx.cs" file but after some time these are showing partially hide.

thank you for your help!

======================CLARIFICATION====================

when i put my cursor on these libraries it show that this using directives are not necessary . when i view solution and want fix it . this ll remove my directives from the top. but i want these directives remain same and active. kindly help me

Answer 1

评论 :- 当您在项目中包含不需要的 dll 库时，它会像隐藏一样显示淡入淡出，因为没有必要，如果您有这些 dll 的工作，那么它将显示为活动状态。