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Maui "Count Button" project results in "Error APT2000 cannot find the file specified" on Android emulator

I just got myself into .NET MAUI using Visual Studio on Windows.
I'm using the "Count Button" basic program but while I successfully made it run on Windows, I couldn't made it run on Android, even using different android emulators (with different APIs versions).
This is what my Console sent back :
`L'opération de génération a démarré...
Démarrage de l'émulateur nexus_5_-_api_33...
1>------ Début de la génération : Projet : Phoneword, Configuration : Debug Any CPU ------
C:\Program Files (x86)\Android\android-sdk\emulator\emulator.EXE -netfast -accel on -avd nexus_5_-_api_33 -prop monodroid.avdname=nexus_5_-_api_33
1>Les analyseurs ont été ignorés pour accélérer la génération. Vous pouvez exécuter la commande « Build » ou « Rebuild » pour exécuter des analyseurs.
1>Phoneword -> C:\Users\Marou\Documents\Développement mobile\cours\Phoneword\Phoneword\bin\Debug\net6.0-android\Phoneword.dll
1>C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\32.0.476\tools\Xamarin.Android.Aapt2.targets(212,3): error APT2000: Le fichier spécifié est introuvable. (2).
1>Génération du projet "Phoneword.csproj" terminée -- ÉCHEC.
========== Build : 0 réussite(s), 1 échec(s), 0 à jour, 0 ignorée(s) ==========
========== 00:15,658 écoulé ==========
========== Déploiement : 0 réussi, 0 a échoué, 0 ignoré =========
========== 00:15,659 écoulé ==========
L'émulateur nexus_5_-_api_33 est en cours d'exécution.`
Thank you for any help or advice.
I tried to run the basic Count Button Program for MAUI projects on Visual Studio.
I expected for the Android emulation to work the same way as the Windows tryout, but it didn't.

The build error is caused by putting project in a folder/directory containing some non-ASCII chars, like Czech alphabet (tested with á) breaks Android build.
However, this does not affect any other C# projects.
For more details, you can refer to Android - APT2000 build error when project path contains non-ASCII symbols and Application cannot be deployed on Android (APT error APT2000).

How to create NuGet.config for my project?

I have a small project(I will add some files later). In VS,From Tools->NuGet Package Manager
dir in my repo
Mode LastWriteTime Length Name
---- ------------- ------ ----
d----- 8/22/2021 3:28 PM bin
d----- 8/22/2021 6:11 PM obj
-a---- 8/22/2021 6:12 PM 9563 Appointments.csproj
-a---- 8/20/2021 1:57 PM 344 Appointments.csproj.user
------ 7/27/2021 7:13 AM 2100 Appointments.sln
------ 7/27/2021 7:13 AM 1749 Package.appxmanifest
------ 7/27/2021 7:13 AM 1985 SampleConfiguration.cs
------ 7/27/2021 7:13 AM 12184 Scenario1_Define.xaml.cs
------ 7/27/2021 7:13 AM 2334 Scenario2_Add.xaml.cs
------ 7/27/2021 7:13 AM 3991 Scenario3_Replace.xaml.cs
------ 7/27/2021 7:13 AM 3387 Scenario4_Remove.xaml.cs
------ 7/27/2021 7:13 AM 1475 Scenario5_Show.xaml.cs
------ 7/27/2021 7:13 AM 6284 Scenario6_Recurrence.xaml.cs
Nuget Packages for Solution
How to create a NuGet.config file in my repo?

Assuming you have the .NET (Core) SDK installed, and therefore have the dotnet CLI available, run dotnet new nugetconfig in the directory you want the nuget.config file created.
I also recommend using the dotnet cli and/or nuget.exe to edit the file, or edit it with a text editor. The Visual Studio options dialog is not sophisticated enough to know which nuget.config file you want to add a source to (and doesn't provide a gui to edit any setting other than source), so you might find sources and added and deleted from nuget.config files you didn't intend if you use it.

Service Fabric application upgrade fails. FileLoadException

I'm trying to upgrade the sample app (Voting) from Microsoft using Visual Studio 2019.
During the update I get the following error:
4>FABRIC_E_IMAGEBUILDER_UNEXPECTED_ERROR: One or more errors occurred. --> AggregateException: One or more errors occurred. --> FileLoadException: The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)
4>Registration of application type failed.
4>At C:\Program Files\Microsoft SDKs\Service Fabric\Tools\PSModule\ServiceFabricSDK\Publish-UpgradedServiceFabricApplication.ps1:258 char:17
4>+ throw "Registration of application type failed."
4>+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4> + CategoryInfo : OperationStopped: (Registration of application type failed.:String) [], RuntimeException
4> + FullyQualifiedErrorId : Registration of application type failed.
The full output is:
1>------ Build started: Project: VotingWeb, Configuration: Debug Any CPU ------
2>------ Build started: Project: VotingData, Configuration: Debug Any CPU ------
2>Waiting for output folder cleanup...
1>Waiting for output folder cleanup...
1>Output folder cleanup has been completed.
2>Output folder cleanup has been completed.
1>VotingWeb -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingWeb\bin\Debug\net472\win7-x64\VotingWeb.exe
2>VotingData -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingData\bin\Debug\net472\win7-x64\VotingData.exe
3>------ Build started: Project: Voting, Configuration: Debug x64 ------
4>------ Publish started: Project: Voting, Configuration: Debug x64 ------
4>Started executing script 'GetApplicationExistence'.
4>Finished executing script 'GetApplicationExistence'.
4>Time elapsed: 00:00:02.7466922
-------- Package started: Project: Voting, Configuration: Debug x64 ------
Das Verzeichnis ist nicht leer.
VotingData -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingData\bin\Debug\net472\win7-x64\VotingData.exe
VotingData -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingData\obj\Debug\net472\win7-x64\PubTmp\Out\
VotingWeb -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingWeb\bin\Debug\net472\win7-x64\VotingWeb.exe
VotingWeb -> C:\DEV\Teamcity test\service-fabric-sample-app\VotingWeb\obj\Debug\net472\win7-x64\PubTmp\Out\
Voting -> C:\DEV\Teamcity test\service-fabric-sample-app\Voting\pkg\Debug
-------- Package: Project: Voting succeeded, Time elapsed: 00:00:34.0353563 --------
4>Started executing script 'Deploy-FabricApplication.ps1'.
4>powershell -NonInteractive -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -Command ". 'C:\DEV\Teamcity test\service-fabric-sample-app\Voting\Scripts\Deploy-FabricApplication.ps1' -ApplicationPackagePath 'C:\DEV\Teamcity test\service-fabric-sample-app\Voting\pkg\Debug' -PublishProfileFile 'C:\DEV\Teamcity test\service-fabric-sample-app\Voting\PublishProfiles\Cloud.xml' -DeployOnly:$false -ApplicationParameter:#{} -UnregisterUnusedApplicationVersionsAfterUpgrade $false -OverrideUpgradeBehavior 'None' -OverwriteBehavior 'SameAppTypeAndVersion' -SkipPackageValidation:$false -ErrorAction Stop"
4>Application Type VotingType and Version 1.7.2 was already registered with Cluster, unregistering it...
4>Unregister application type succeeded.
4>Copying application package to image store...
4>Upload to Image Store succeeded
4>Registering application type...
4>Register application type started. Use Get-ServiceFabricApplicationType to query for status.
4>Running Image Builder process ...
4>Downloading application package from 'VotingType' ...
4>Downloaded 101/999 Files (10.1% complete)
4>Downloaded 229/999 Files (22.9% complete)
4>Downloaded 291/999 Files (29.1% complete)
4>Downloaded 363/999 Files (36.3% complete)
4>Downloaded 447/999 Files (44.7% complete)
4>Downloaded 559/999 Files (56.0% complete)
4>Validating package and computing checksums ...
4>FABRIC_E_IMAGEBUILDER_UNEXPECTED_ERROR: One or more errors occurred. --> AggregateException: One or more errors occurred. --> FileLoadException: The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)
4>Registration of application type failed.
4>At C:\Program Files\Microsoft SDKs\Service Fabric\Tools\PSModule\ServiceFabricSDK\Publish-UpgradedServiceFabricApplication.ps1:258 char:17
4>+ throw "Registration of application type failed."
4>+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4> + CategoryInfo : OperationStopped: (Registration of application type failed.:String) [], RuntimeException
4> + FullyQualifiedErrorId : Registration of application type failed.
4>
4>Finished executing script 'Deploy-FabricApplication.ps1'.
4>Time elapsed: 00:01:44.9589058
4>The PowerShell script failed to execute.
========== Build: 3 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Publish: 0 succeeded, 1 failed, 0 skipped ==========
How can I find out which file is in use?
And how can I fix it?
Solution:
In case that someone else faces the same issue, the solution for me was to upgrade the application using Powershell and set the CompressPackage parameter in the Copy-ServiceFabricApplicationPackage command.
Helpfull link: https://learn.microsoft.com/de-de/azure/service-fabric/service-fabric-package-apps

Building C# .NET in command line gives error: Package 'Code Analysis Package' failed to load

I am compile a sample C# .NET project using build.cmd file. The content of the build.cmd is as bellow.
build.cmd
#echo off
setlocal
set devenv="c:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\devenv.com"
del *.log >nul
%devenv% WindowsFormsApplication3.sln /rebuild "Release" /out WindowsFormsApplication3.log
if ERRORLEVEL 1 GOTO failed
findstr /C:"========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========" WindowsFormsApplication3.log >nul
if ERRORLEVEL 1 GOTO failed
echo *** BUILD SUCCESSFUL ***
pause
goto :EOF
:failed
echo.
echo.
echo *** BUILD FAILED ***
pause
Project compiles properly. But when i opened the log file it hassome error
WindowsFormsApplication3.log
1>------ Rebuild All started: Project: WindowsFormsApplication3, Configuration: Release Any CPU ------
Package 'Code Analysis Package' failed to load.
1> WindowsFormsApplication3 -> E:\Bin\junk\WindowsFormsApplication3\WindowsFormsApplication3\bin\Release\WindowsFormsApplication3.exe
========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ==========
I don't why i am getting this error (Package 'Code Analysis Package' failed to load) in log file.
I searched online but did not get any help.
how to solve this problem?
Note: WindowsFormsApplication3 is a sample project. i Opened VS2015 and New Project -> Visual C# -> Windows Form Application. I did not change any thing in the project.

Give Microsoft a chance to analyze and fix the problem.
I created a connect issue because the problem occurs on two PCs that both have vanilla VS 2015 installations.
https://connect.microsoft.com/VisualStudio/feedback/details/2423616/package-code-analysis-package-failed-to-load
Within the next few weeks, a guy from Microsoft will probably comment on that. You can followup there.

HRESULT = 80004005 with Visual Studio 2008

I'm getting this error when building my project, and I can't fix it.
I have two solutions with the same setup projects referenced in both, and probably thus, the problem.
I googled, I look it up here in StackOverflow, and did all what people said that should be done: removing and readding references, and a long etcetera.
I will paste here my output hoping that someone can throw a little ray of hope on me, please..
thanks a lot everybody in advance.
Best,
Manuel.
------ Build started: Project: CPTUtils, Configuration: Debug Any CPU ------
CPTUtils -> D:\Projects\DuboCalc\DataLayer\CPTUtils\bin\Debug\CPTUtils.dll
------ Build started: Project: CPT.Security, Configuration: Debug Any CPU ------
CPT.Security -> D:\Projects\DuboCalc\DataLayer\Tools\CPT.Security\bin\Debug\CPT.Security.dll
------ Build started: Project: CPTTranslations, Configuration: Debug Any CPU ------
CPTTranslations -> D:\Projects\DuboCalc\DataLayer\CPTTranslations\bin\Debug\CPTTranslations.dll
------ Build started: Project: CPTDB, Configuration: Debug Any CPU ------
CPTDB -> D:\Projects\DuboCalc\DataLayer\CPTDB\bin\Debug\CPTDB.dll
------ Build started: Project: DBManagement, Configuration: Debug Any CPU ------
DBManagement -> D:\Projects\DuboCalc\DataLayer\DBManagement\bin\Debug\DBManagement.dll
------ Build started: Project: DBMGTBaseExtensions, Configuration: Debug Any CPU ------
DBMGTBaseExtensions -> D:\Projects\DuboCalc\DataLayer\DBMGTBaseExtensions\bin\Debug\DBMGTBaseExtensions.dll
------ Build started: Project: Exporter, Configuration: Debug Any CPU ------
Exporter -> D:\Projects\DuboCalc\DataLayer\Exporter\bin\Debug\Exporter.dll
copy "D:\Projects\DuboCalc\DataLayer\Exporter\bin\Debug\Exporter.dll" "D:\Projects\DuboCalc\DuboCalc2.0\bin\Debug\"
copy "D:\Projects\DuboCalc\DataLayer\Exporter\bin\Debug\Exporter.pdb" "D:\Projects\DuboCalc\DuboCalc2.0\bin\Debug\"
1 file(s) copied.
1 file(s) copied.
------ Build started: Project: DBMgtRevisioning, Configuration: Debug Any CPU ------
DBMgtRevisioning -> D:\Projects\DuboCalc\DataLayer\DBMgtRevisioning\bin\Debug\DBMgtRevisioning.dll
------ Build started: Project: NetworkTools, Configuration: Debug Any CPU ------
NetworkTools -> D:\Projects\DuboCalc\DataLayer\Tools\NetworkTools\bin\Debug\NetworkTools.dll
------ Build started: Project: DBInstaller, Configuration: Debug Any CPU ------
DBInstaller -> D:\Projects\DuboCalc\DuboCalc2.0\DBInstaller\bin\Debug\DBInstaller.exe
------ Build started: Project: DCClasses, Configuration: Debug Any CPU ------
DCClasses -> D:\Projects\DuboCalc\DCClasses\DCClasses\bin\Debug\DCClasses.dll
------ Build started: Project: XMLReporter, Configuration: Debug Any CPU ------
Consider app.config remapping of assembly "EnvDTE, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "7.0.3300.0" [] to Version "8.0.0.0" [C:\Program Files (x86)\Common Files\Microsoft Shared\MSEnv\PublicAssemblies\EnvDTE.dll] to solve conflict and get rid of warning.
C:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets : warning MSB3247: Found conflicts between different versions of the same dependent assembly.
XMLReporter -> D:\Projects\DuboCalc\DuboCalc2.0\XMLReporter\bin\Debug\XMLReporter.exe
Done building project "XMLReporter.csproj".
------ Build started: Project: DuboCalc2.0, Configuration: Debug Any CPU ------
C:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets : warning : The referenced project '..\..\DCClasses\DCClasses\DCClasses\DCClasses.csproj' does not exist.
Consider app.config remapping of assembly "CPT.Security, Culture=neutral, PublicKeyToken=d593bbb549999bfb" from Version "1.0.4314.17230" [D:\Projects\DataLayer\CPTDB\bin\Debug\CPT.Security.dll] to Version "1.0.4402.23887" [D:\Projects\DuboCalc\DataLayer\Tools\CPT.Security\bin\Debug\CPT.Security.dll] to solve conflict and get rid of warning.
C:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets : warning MSB3247: Found conflicts between different versions of the same dependent assembly.
C:\Windows\Microsoft.NET\Framework\v3.5\Csc.exe /noconfig /nowarn:1701,1702 /errorreport:prompt /warn:4 /define:DEBUG;TRACE /main:DuboCalc2._0.Program /reference:D:\Projects\DuboCalc\DataLayer\Tools\CPT.Security\bin\Debug\CPT.Security.dll /reference:D:\Projects\DataLayer\CPTDB\bin\Debug\CPTDB.dll /reference:D:\Projects\DuboCalc\DataLayer\CPTTranslations\bin\Debug\CPTTranslations.dll /reference:D:\Projects\DuboCalc\DataLayer\CPTUtils\bin\Debug\CPTUtils.dll /reference:D:\Projects\DuboCalc\DuboCalc2.0\DBInstaller\bin\Debug\DBInstaller.exe /reference:D:\Projects\DataLayer\DBManagement\bin\Debug\DBManagement.dll /reference:D:\Projects\DuboCalc\DataLayer\DBMGTBaseExtensions\bin\Debug\DBMGTBaseExtensions.dll /reference:D:\Projects\DuboCalc\DataLayer\DBMgtRevisioning\bin\Debug\DBMgtRevisioning.dll /reference:D:\Projects\DuboCalc\DCClasses\DCClasses\bin\Debug\DCClasses.dll /reference:D:\Projects\DuboCalc\DataLayer\Exporter\bin\Debug\Exporter.dll /reference:..\dll\Infragistics2.Excel.v9.2.dll /reference:..\dll\Infragistics2.Shared.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinChart.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinDataSource.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinGrid.ExcelExport.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinGrid.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinTabControl.v9.2.dll /reference:..\dll\Infragistics2.Win.UltraWinTree.v9.2.dll /reference:..\dll\Infragistics2.Win.v9.2.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\Microsoft.VisualBasic.dll /reference:D:\Projects\DuboCalc\DataLayer\Tools\NetworkTools\bin\Debug\NetworkTools.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.configuration.dll /reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll" /reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.DataSetExtensions.dll" /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Deployment.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Design.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Runtime.Serialization.Formatters.Soap.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Web.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /reference:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Xml.Linq.dll" /reference:D:\Projects\DuboCalc\DuboCalc2.0\XMLReporter\bin\Debug\XMLReporter.exe /debug+ /debug:full /filealign:512 /nowin32manifest /optimize- /out:obj\Debug\DuboCalc2.0.exe /resource:obj\Debug\DuboCalc2._0.Forms.AxisAnalysisForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.EnvironmentRatiosForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.frmAbout.resources /resource:obj\Debug\DuboCalc2._0.Forms.frmData.resources /resource:obj\Debug\DuboCalc2._0.Forms.frmSplash.resources /resource:obj\Debug\DuboCalc2._0.Graph.resources /resource:obj\Debug\DuboCalc2._0.Forms.LibrarySelectionForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.LibrarySelectionForProject.resources /resource:obj\Debug\DuboCalc2._0.Forms.LibrarySelectionForUpgrade.resources /resource:obj\Debug\DuboCalc2._0.Forms.MassBalanceForm.resources /resource:obj\Debug\DuboCalc2._0.ProjectForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.ProjectPropertiesForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.ReportSelectionForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.SearchResultsForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.TotalOverviewForm.resources /resource:obj\Debug\DuboCalc2._0.Forms.UpdatePreviewForm.resources /resource:obj\Debug\DuboCalc2._0.SearchForm.resources /resource:obj\Debug\DuboCalc2._0.frm_AddMaterialProcess.resources /resource:obj\Debug\DuboCalc2._0.OptionsForm.resources /resource:obj\Debug\DuboCalc2._0.SimpleSearchForm.resources /resource:obj\Debug\DuboCalc2._0.TypeEditor.ExtraPropertiedForm.resources /resource:obj\Debug\DuboCalc2._0.UILongString.resources /resource:obj\Debug\DuboCalc2._0.Forms.VariantAnalysisForm.resources /resource:obj\Debug\DuboCalc2._0.DuboCalcMain.resources /resource:obj\Debug\DuboCalc2._0.Properties.Resources.resources /resource:obj\Debug\DuboCalc2._0.WinFormStrings.resources /resource:Resources\english.resources,DuboCalc2._0.Resources.english.resources /resource:Resources\DuboCalc2._0.i18n.resources,DuboCalc2._0.Resources.DuboCalc2._0.i18n.resources /resource:Entities.bmp,DuboCalc2._0.Entities.bmp /resource:obj\Debug\DuboCalc2.0.exe.licenses /target:winexe /win32icon:DC.ico DCHelp\HelpManager.cs Forms\AxisAnalysisForm.cs Forms\AxisAnalysisForm.Designer.cs Forms\EnvironmentRatiosForm.cs Forms\EnvironmentRatiosForm.Designer.cs Forms\frmAbout.cs Forms\frmAbout.Designer.cs Forms\frmData.cs Forms\frmData.Designer.cs Forms\frmSplash.cs Forms\frmSplash.Designer.cs Forms\Graph.cs Forms\Graph.Designer.cs Forms\LibrarySelectionForm.cs Forms\LibrarySelectionForm.Designer.cs Forms\LibrarySelectionForProject.cs Forms\LibrarySelectionForProject.Designer.cs Forms\LibrarySelectionForUpgrade.cs Forms\LibrarySelectionForUpgrade.Designer.cs Forms\MassBalanceForm.cs Forms\MassBalanceForm.Designer.cs Forms\ProjectPropertiesForm.cs Forms\ProjectPropertiesForm.Designer.cs Forms\ReportSelectionForm.cs Forms\ReportSelectionForm.Designer.cs Forms\SearchResultsForm.cs Forms\SearchResultsForm.Designer.cs Forms\TotalOverviewForm.cs Forms\TotalOverviewForm.Designer.cs Forms\UpdatePreviewForm.cs Forms\UpdatePreviewForm.Designer.cs HelperClasses\DuboCalcSettings.cs HelperClasses\ExcelExporter.cs HelperClasses\ItnterFaces.cs HelperClasses\JSONConverter.cs HelperClasses\ScreenGraber.cs HelperClasses\Utils.cs LibUpdate\LibraryUpdater.cs LibUpdate\ItemComparator.cs ProjectExplorer\GUIMaterial.cs ProjectExplorer\GUIProcess.cs Forms\SearchForm.cs Forms\SearchForm.Designer.cs Forms\DropDownTreeView.cs Forms\frm_AddMaterialProcess.cs Forms\frm_AddMaterialProcess.Designer.cs Forms\ProjectForm.cs Forms\ProjectForm.Designer.cs TypeEditor\CollectionEditor.cs TypeEditor\ExtraPropertiedForm.cs TypeEditor\ExtraPropertiedForm.Designer.cs TypeEditor\LongStringEditor.cs Forms\OptionsForm.cs Forms\OptionsForm.Designer.cs IconManager.cs Icons.cs ProjectExplorer\GUIItemMaterial.cs ProjectExplorer\GUIItemProcess.cs Forms\SimpleSearchForm.cs Forms\SimpleSearchForm.Designer.cs UILongString.cs WinFormStrings.nl-NL.Designer.cs I18n.cs ProjectExplorer\Element.cs Forms\VariantAnalysisForm.cs Forms\VariantAnalysisForm.Designer.cs ProjectExplorer\GUIItem.cs ProjectExplorer\Project.cs ProjectExplorer\XMLHelper.cs DuboCalcMain.cs DuboCalcMain.Designer.cs Program.cs Properties\AssemblyInfo.cs Properties\Resources.Designer.cs Properties\Settings.Designer.cs ProjectExplorer\Variant.cs WinFormStrings.Designer.cs
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\DuboCalcMain.cs(22,7): warning CS0105: The using directive for 'System.Data' appeared previously in this namespace
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\Forms\DropDownTreeView.cs(48,15): warning CS0108: 'DuboCalc2._0.DropDownTreeView.Margin' hides inherited member 'System.Windows.Forms.Control.Margin'. Use the new keyword if hiding was intended.
c:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll: (Related file)
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\Forms\frm_AddMaterialProcess.Designer.cs(166,64): warning CS0108: 'DuboCalc2._0.frm_AddMaterialProcess.Name' hides inherited member 'System.Windows.Forms.Control.Name'. Use the new keyword if hiding was intended.
c:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll: (Related file)
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\Forms\ProjectForm.cs(2263,42): warning CS0168: The variable 'ex' is declared but never used
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\DuboCalcMain.cs(289,21): warning CS0162: Unreachable code detected
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\ProjectExplorer\Project.cs(668,20): warning CS0219: The variable 'toc_content' is assigned but its value is never used
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\I18n.cs(28,30): warning CS0168: The variable 'e' is declared but never used
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\Forms\ProjectForm.cs(49,22): warning CS0414: The field 'DuboCalc2._0.ProjectForm.m_multiselect' is assigned but its value is never used
D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\Forms\SearchForm.cs(28,22): warning CS0414: The field 'DuboCalc2._0.SearchForm.rename' is assigned but its value is never used
Compile complete -- 0 errors, 9 warnings
C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\AL.exe /culture:nl-NL /out:obj\Debug\nl-NL\DuboCalc2.0.resources.dll /template:obj\Debug\DuboCalc2.0.exe /embed:obj\Debug\DuboCalc2._0.WinFormStrings.nl-NL.resources
C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\AL.exe /culture:en-US /out:obj\Debug\en-US\DuboCalc2.0.resources.dll /template:obj\Debug\DuboCalc2.0.exe /embed:Resources\english.en-US.resources,DuboCalc2._0.Resources.english.en-US.resources
DuboCalc2.0 -> D:\Projects\DuboCalc\DuboCalc2.0\DuboCalc2.0\bin\Debug\DuboCalc2.0.exe
Done building project "DuboCalc2.0.csproj".
------ Starting pre-build validation for project 'DuboCalcInstallNoSQL' ------
WARNING: File 'jit.js' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'example1.js' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'Spacetree.css' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'DuboCalcOptions.xml' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'base.css' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'form.html' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'excanvas.js' should not be installed into a User's Profile folder because it may not be available to all users.
WARNING: File 'jit-yc.js' should not be installed into a User's Profile folder because it may not be available to all users.
ERROR: Invalid or unspecified target for shortcut 'DuboCalc 2.1'
ERROR: An error occurred while validating. HRESULT = '80004005'
------ Pre-build validation for project 'DuboCalcInstallNoSQL' completed ------
------ Build started: Project: DuboCalcInstallNoSQL, Configuration: Debug ------
========== Build: 13 succeeded or up-to-date, 1 failed, 0 skipped ==========

I solved this checking the whole project out again and starting from scratch.. took me a whole day, but I fixed it :)