I get the problem that most of the people confront with writting dot net 2.0 using vs2005. I am developing a web application using c# on Windows XP sp-2. I have installed AJAX.net 1.0, dotNet Framework 2.0 and 3.0. and dotNet future. What I have done is that I reinstall my windows xp. The error occurred. The application can be compiled and ran but in a very slowy response. The errors are as follows:

'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\WebDev.WebServer.EXE', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\WebDev.WebHost\8.0.0.0__b03f5f7f11d50a3a\WebDev.WebHost.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Windows.Forms\2.0.0.0__b77a5c561934e089\System.Windows.Forms.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Configuration\2.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Xml\2.0.0.0__b77a5c561934e089\System.Xml.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\mscorlib.resources\2.0.0.0_zh-CHT_b77a5c561934e089\mscorlib.resources.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.resources\2.0.0.0_zh-CHT_b03f5f7f11d50a3a\System.Web.resources.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\Microsoft.JScript\8.0.0.0__b03f5f7f11d50a3a\Microsoft.JScript.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\VJSharpCodeProvider\2.0.0.0__b03f5f7f11d50a3a\VJSharpCodeProvider.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\CppCodeProvider\8.0.0.0__b03f5f7f11d50a3a\CppCodeProvider.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\mrp\6843be3d\fce678a7\App_Code.-f3e4rfx.dll', Symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.Mobile\2.0.0.0__b03f5f7f11d50a3a\System.Web.Mobile.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.ServiceModel\3.0.0.0__b77a5c561934e089\System.ServiceModel.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\SMDiagnostics\3.0.0.0__b77a5c561934e089\SMDiagnostics.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.Extensions\1.0.61025.0__31bf3856ad364e35\System.Web.Extensions.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\mrp\6843be3d\fce678a7\App_Web_11nmnrfk.dll', Symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\mrp\6843be3d\fce678a7\assembly\dl3\040713a5\7680ea07_4c98c701\AjaxControlToolkit.DLL', Symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.RegularExpressions\2.0.0.0__b03f5f7f11d50a3a\System.Web.RegularExpressions.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.Services\2.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\System.EnterpriseServices\2.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_32\System.EnterpriseServices\2.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.Wrapper.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\mrp\6843be3d\fce678a7\assembly\dl3\859bf74a\003c5caf_da26c401\EeekSoft.Web.PopupWin.DLL', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Runtime.Serialization\3.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.IdentityModel\3.0.0.0__b77a5c561934e089\System.IdentityModel.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Web.Extensions.Design\1.0.61025.0__31bf3856ad364e35\System.Web.Extensions.Design.dll', No symbols loaded.
'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Design\2.0.0.0__b03f5f7f11d50a3a\System.Design.dll', No symbols loaded.

I have found a Microsoft Symbols Packages at:

http://www.microsoft.com/whdc/devtools/debugging/symbolpkg.mspx

after I installed it, there is still the same problems.

Hi manpakhong,

Have you tried to repair Visual Studio 2005?

Control Panel | Add or Remove Programs | Visual Studio 2005 version... | Change/Remove | repair

Thanks for your help. Eventually I reinstall the windows and following the step of installation, then the problem is gone.

Install VS2005 -> install Ajax 1.0 -> install .net future 1.0 -> install Ajax control toolkit 1.0.

And at the same time I find another ariticle that saying about the missing symbols. It has a solution to get rid of it:

http://www.codeproject.com/debug/symbols.asp?print=true

Thanks you for your help!

1. And another question. Any articles introduce what is symbols and I want to know it much.

2. Symbols file is ended with extension .pdb. My friend have said to me that Web program can be compiled that all the original script code is hidden from user, even the code behind file will be compiled, but I can find the truth. Do my friend misunderstand it or what he had told me is wrong?