PRB: "Could not load type" error message when you browse to .aspx page by using Visual C# .NET (306155)

The information in this article applies to:

Microsoft ASP.NET (included with the .NET Framework) 1.0
Microsoft Visual C# .NET (2002)

This article was previously published under Q306155

SYMPTOMS

When you browse to an .aspx page, you may receive one of the following error messages:

Could not load type 'Namespace.Global'.

-or-

Could not load type 'Namespace.PageName'.

CAUSE

These errors occur if the .aspx page or the Global.asax page contains a reference to a code-behind module and if the application has not been built.

RESOLUTION

Use one of the following methods to build the application:

Use the C# command line compiler (CSC.exe) to run the following command:
csc /t:library /r:System.web.dll /out:mydll.dll myfile.cs
In Microsoft Visual Studio .NET, click Build on the Build menu.

NOTE: Microsoft Visual Basic .NET background compiles the project as soon as it is created. Because Visual C# .NET projects only background parse, you must explicitly build the application.

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce the Behavior

Start Visual Studio .NET.
On the File menu, point to New, and then click Project.
Click Visual C# Projects under Project Types, and then click ASP.NET Web Application under Templates.
Right-click WebForm1.aspx, and then click View in Browser.

REFERENCES

For more information about building assemblies, visit the following MSDN Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconprogrammingwithassemblies.asp

Modification Type:	Minor	Last Reviewed:	5/17/2004
Keywords:	kbCompiler kberrmsg kbprb kbWebForms KB306155