The type or namespace name "Wuqi" cannot be found in the global namespace.

The type or namespace name "Wuqi" cannot be found in the global namespace.

The AspNetPager control is downloaded for paging. After the control is placed in the project, an error is reported: the type or namespace name "Wuqi" cannot be found in the global namespace ".

Solution: add an AspNetPager reference to the "Reference" in the project drop-down box.

The type or namespace name "Infragistics" cannot be found in the global namespace (is the Assembly reference missing ?)

It should be a third-party control. You need to import its DLL to add references, and then add USING to the Code section.

C # when creating a subwindow, the system prompts that the type or space name from2 cannot be found.

We should solve the problem from the problem...
Since it is a namespace, we should look at it from the perspective of namespace...
Your namespace is form2.cs your public partial class Form1: Form
So no
This small problem
Note:
Hope to help you