Bounty: I will send $5 via paypal for an answer that fixes this problem for me.
I'm not sure what VS setting I've changed or if it's a web.config setting or what, but I keep getting this error in the error list and yet all solutions build fine. Here are some examples:
Error 5 'CompilerGlobalScopeAttribute' is ambiguous in the namespace 'System.Runtime.CompilerServices'. C:\projects\MyProject\Web\Controls\EmailStory.ascx 609 184 C:\...\Web\ Error 6 'ArrayList' is ambiguous in the namespace 'System.Collections'. C:\projects\MyProject\Web\Controls\EmailStory.ascx.vb 13 28 C:\...\Web\ Error 7 'Exception' is ambiguous in the namespace 'System'. C:\projects\MyProject\Web\Controls\EmailStory.ascx.vb 37 21 C:\...\Web\ Error 8 'EventArgs' is ambiguous in the namespace 'System'. C:\projects\MyProject\Web\Controls\EmailStory.ascx.vb 47 64 C:\...\Web\ Error 9 'EventArgs' is ambiguous in the namespace 'System'. C:\projects\MyProject\Web\Controls\EmailStory.ascx.vb 140 72 C:\...\Web\ Error 10 'Array' is ambiguous in the namespace 'System'. C:\projects\MyProject\Web\Controls\EmailStory.ascx.vb 147 35 C:\...\Web\ [...etc...] Error 90 'DateTime' is ambiguous in the namespace 'System'. C:\projects\MyProject\Web\App_Code\XsltHelperFunctions.vb 13 8 C:\...\Web\
As you can imagine, it's really annoying since there are blue squiggly underlines everywhere in the code, and filtering out relevant errors in the Error List pane is near impossible. I've checked the default ASP.Net web.config and machine.config but nothing seemed to stand out there.
Edit: Here's some of the source where the errors are occurring:
'Error #5: whole line is blue underlined'
<%= addEmailToList.ToolTip %>
'Error #6: ArrayList is blue underlined'
Private _emails As New ArrayList()
'Error #7: Exception is blue underlined'
Catch ex As Exception
'Error #8: System.EventArgs is blue underlined'
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'Error #9: System.EventArgs is blue underlined'
Protected Sub sendMessage_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles sendMessage.Click
'Error #10: Array is blue underlined'
Me.emailSentTo.Text = Array.Join(";", mailToAddresses)
'Error #90: DateTime is blue underlined'
If DateTime.TryParse(data, dateValue) Then
Edit: GacUtil results
C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\gacutil -l mscorlib Microsoft (R) .NET Global Assembly Cache Utility. Version 1.1.4318.0 Copyright (C) Microsoft Corporation 1998-2002. All rights reserved. The Global Assembly Cache contains the following assemblies: The cache of ngen files contains the following entries: mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c5619 34e089, Custom=5a00410050002d004e0035002e0031002d003800460053002d003700430039004 40037004500430036000000 mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c5619 34e089, Custom=5a00410050002d004e0035002e0031002d0038004600440053002d00370043003 900450036003100370035000000 Number of items = 2
"C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin\gacutil" -l mscorlib Microsoft (R) .NET Global Assembly Cache Utility. Version 2.0.50727.42 Copyright (c) Microsoft Corporation. All rights reserved. The Global Assembly Cache contains the following assemblies: Number of items = 0
Edit: interesting results from ngen:
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\ngen display mscorlib /verbose
Microsoft (R) CLR Native Image Generator - Version 2.0.50727.832
Copyright (C) Microsoft Corporation 1998-2002. All rights reserved.
NGEN Roots:
mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=5a00410050002d004e0035002e0031002d003800460053002d00330037004200430043003300430035000000
ScenarioDefault
mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=5a00410050002d004e0035002e0031002d003800460053002d00330037004200430043003300430035000000
DisplayName = mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Native image = {7681CE0F-F0E7-F03A-2B56-96345589D82B}
Hard Dependencies:
Soft Dependencies:
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
ScenarioNoDependencies
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
DisplayName = mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Native image = {7681CE0F-F0E7-F03A-2B56-96345589D82B}
Hard Dependencies:
Soft Dependencies:
NGEN Roots that depend on "mscorlib":
[...a bunch of stuff...]
Native Images:
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
Source MVID: {D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Source HASH: bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
NGen GUID sign: {7681CE0F-F0E7-F03A-2B56-96345589D82B}
OS: WinNT
Processor: x86(Pentium 4) (features: 00008001)
Runtime: 2.0.50727.832
mscorwks.dll: TimeStamp=461F2E2A, CheckSum=00566DC9
Flags:
Scenarios: <no debug info> <no debugger> <no profiler> <no instrumentation>
Granted set: <PermissionSet class="System.Security.PermissionSet" version="1" Unrestricted="true"/>
File:
C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\0fce8176e7f03af02b5696345589d82b\mscorlib.ni.dll
Dependencies:
mscorlib, Version=2.0.0.0, PublicKeyToken=b77a5c561934e089:
Guid:{D34102CF-2ABF-4004-8B42-2859D8FF27F3}
Sign:bbf5cfc19bea4e13889e39eb1fb72479a45ad0ec
There should only be one mscorlib in the native images, correct? How can I get rid of the others?
Based on the results of your gacutil output (thanks for doing that; I think it helps), I would say you need to try and run a repair on the .NET Framework install and Visual Studio 2005. I'm not sure if that will fix it, but as you can see from the output of the gacutil, you have none for 2.0.
From my VS2005 Command Prompt, I get:
From my VS2003 Command Prompt, I get:
I've been hit by this as well, specifically System.Data.SqlClient. Try unchecking namespaces in the Project manager and manually including them in the .vb file, like you would with C#:
Imports System.Data.SqlClient