Resolving the Could not create ASP.content_xxx_aspx Error in ASP.NET

Learn how to troubleshoot and fix the `Server could not create ASP.content_xxx_aspx` error in ASP.NET by ensuring unique names for your classes and web forms.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Could not create ASP.content_xxx_aspx

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting the Could not create ASP.content_xxx_aspx Error in ASP.NET

If you're an ASP.NET developer, you might have encountered the perplexing error message: "Server could not create ASP.content_admin_matkul_aspx." This error often arises when attempting to run your web application in IIS, and it can be incredibly frustrating, especially when the code appears to be error-free at first glance. In this post, we will delve into the causes of this error and provide you with a clear, step-by-step solution to resolve it efficiently.

Understanding the Error

The error message indicates that the ASP.NET server was unable to create an instance of the specified page. This issue is typically rooted in a naming conflict or configuration issue. Here’s what you need to look out for:

Name Conflicts: One of the most common reasons for this error is having identical names for your VB class and the corresponding web form.

The Solution: Fixing the Naming Conflict

Step 1: Check Your Naming Conventions

In ASP.NET, it's essential that your class name and the name of your web form are unique. To resolve the error:

Rename the Class or Web Form: You'll need to edit either the class name defined in your code-behind file (.vb) or the name of your .aspx file. Here’s how to do it:

Step 2: Update File References

After renaming, ensure that all references to the class or web form in your project are updated accordingly. This includes checking for:

Any Inherits attributes in your .aspx page

The CodeBehind attribute in your page directive

Step 3: Verify Debug Settings

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Testing the Application

Once you have made the changes:

Restart the IIS server to ensure that all changes are refreshed.

Run your application again in Microsoft Edge.

Conclusion

By ensuring that your VB class and web form have unique names and validating your debugging and configuration settings, you can effectively resolve the "Server could not create ASP.content_xxx_aspx." error. This solution not only clears up the present issue but also helps to prevent similar errors in the future. Happy coding!

If you still encounter difficulties, don’t hesitate to reach out for further assistance. Good luck with your ASP.NET projects!