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关于.net：为什么VS 2005不断给我“ x”在命名空间“ y”中的含义不明确？

2023-04-18 03:34:22

关于.net：为什么VS 2005不断给我“ x”在命名空间“ y”中的含义不明确？

Why does VS 2005 keep giving me the “'x' is ambiguous in the namespace 'y'” error?

赏金：我将通过贝宝(Paypal)发送5美元，以为我解决该问题。

我不确定我更改了哪个VS设置，或者它是web.config设置还是什么，但是我一直在错误列表中看到此错误，但是所有解决方案都可以正常运行。 这里有些例子：

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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\

可以想象，这真令人讨厌，因为代码中到处都有蓝色的波浪状下划线，并且几乎不可能过滤掉"错误列表"窗格中的相关错误。 我检查了默认的ASP.Net web.config和machine.config，但似乎什么都没有。

编辑：这是发生错误的一些来源：

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'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

编辑：GacUtil结果

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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
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"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

编辑：来自ngen的有趣结果：

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C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727
gen 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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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
ativeImages_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

本地映像中应该只有一个mscorlib，对吗？ 我该如何摆脱其他人？

我最近有同样的错误。
这是我修复的方式(希望它也对您有用)：

-打开您的项目属性，转到参考部分。

-在上半部分删除对System的引用。

我认为这是两次引用System，但仅显示一次。因此，引用不明确。

根据您的gacutil输出结果(感谢这样做；我认为这会有所帮助)，我想说您需要尝试对.NET Framework安装和Visual Studio 2005进行修复。我不确定是否会对其进行修复，但是正如从gacutil的输出中看到的那样，您没有2.0版本。

从VS2005命令提示符中，我得到：

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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:
  mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=x86

Number of items = 1

从VS2003命令提示符中，我得到：

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Microsoft (R) .NET Global Assembly Cache Utility.  Version 1.1.4322.573
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=b77a5c561934e089, Custom=5a00410050002d004e0035002e0031002d003800460053002d00330037004200430043003300430035000000
    mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, Custom=5a00410050002d004e0035002e0031002d0038004600440053002d00330037004200440036004600430034000000

Number of items = 2

重新安装.Net Framework 2.0。

那应该解决它。之后，gacutil(来自v2.0)将显示1 mscorlib而不是0。

昨天，我在VS2005 ASP.NET网站项目中得到了相同的结果：突然，在以前的任何重大代码更改中，名称空间y中出现的x负载都是模棱两可的，它们都源自非常基本的符号，例如EventArgs，类型，DBNull等

直接的原因是双重引用mscorlib，正如我在VS的"类视图"中看到的那样。我相信，真正的原因是自动Windows Update迫使我在几分钟前重新启动计算机。

尝试诸如建立一个全新的ASP.NET网站项目之类的特技，将源文本复制粘贴(在同一台计算机上-无济于事)，或者在具有相同VS2005安装的第二台计算机上移动该项目(这有帮助) ，项目正常运行)我几乎可以确定我的代码没有问题，但是我的VS / .NET配置没有问题。而且，我非常不知道如何解决它，因为除了这一问题，互联网上没有任何痕迹描述类似的问题。

我知道这听起来很奇怪，但是您使用"构建"还是"重建"来构建解决方案？如果我遇到类似的有趣问题，则对解决方案进行"全部重建"会有所帮助。

采取一个错误(如ArrayList)，然后用完全限定的名称替换类型(我不确定，但是我猜这里：System.Collection.ArrayList)。如果错误消失了，那么您确实存在解决冲突。如果没有，那就另当别论了。
如果所有解决方案都因这些错误而"完善"，建议您清理项目。删除所有已编译的内容(dll，pdb等)，以及阴影缓存的内容。也许是因为使用旧版本的东西而进行编译。

我也受到了打击，特别是System.Data.SqlClient。尝试取消选中项目管理器中的名称空间，然后手动将它们包括在.vb文件中，就像使用C＃一样：

导入System.Data.SqlClient

当寻求诊断编译问题的帮助时，通常有助于发布令人讨厌的源代码:)

这些错误实际上意味着指定的名称与另一个名称冲突，并且编译器无法解决此问题。看起来确实有点奇怪。

命名空间美元给我不明确

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