Create a new folder in the same folder and create a web form with the same name.

Assume that a web project is named OA,

Create a folder named oa1 in this project, and create a new web form named OA 1.aspx,

Then you can add any web forms or Class Libraries under oa1. For example, you can create a form named oa2.aspx.

Compile the file. In the OA2 form, "oa1 is already included in the namespace ",

The reason is that the namespace Oa. oa1.oa2,

View oa1.aspx. Its namespace is OA,

The class name is public class OA: system. Web. UI. Page.

Oa. oa1 is a class in OA 1.aspx,

In oa2.aspx, it becomes a namespace.

Therefore, an error occurs when oa1 is included in the namespace during compilation.

Therefore, do not create a new folder with the same name as the following web form class library.