Did anyone of You had the same problem as described below? If so, do you have any tip or solution for this?
I have a problem with my local environment. Every time I try to build the solution, a lot of its projects are being skipped and I receive many CS0006 errors: "Metadata file (...) could not be found".
Another thing I noticed is ribbon with message "Current solution contains incorrect configurations mappings. It may cause projects to not work correctly. Open the Configuration Manager to fix them." When I open Configuration Manager, all projects of solution are checked, and everything seems to be correct there.
I use Visual Studio 2022 (64-bit), version 17.4.1 and .NET Framework version 4.8.04084.
I tried almost all recommendations from the Internet, including uninstalling and installing again Visual Studio or reuploading of repository, but there is no update about this problem.
Thank You in advance.
You could try the steps provided by Sabah Shariq.
Right click on the solution and click Properties.
Click Configuration on the left.
Make sure the check box under "Build" for the project is checked. If check then uncheck and check again and save the settings.
Clean the solution by right clicking on the project solution and rebuild the project again.
Make sure you don't have any other error messages in your project and if you do, fix those first!
For more information, please refer to:
Error CS0006_Metadata file could not be found
Thank you for your help. I have found the cause of this problem by myself. It turned out that some lines of code was removed from sln file by mistake (in my opinion there was an error of Visual Studio). When I re-added them, the solution is able to be built.
Anyway, thank you for your support.
Maybe someone of you can help me by my problem. At first to make clear this problem is a known problem on stackoverflow and I read all the solutions for that problem and tried them out but this do not solved my problem.
Problem:
MSB3027: Could not copy
"C:\Users\SpecificUser.nuget\packages\opentap\9.10.4\build\payload\Dependencies\System.Runtime.InteropServices.RuntimeInformation.4.0.2.0\System.Runtime.InteropServices.RuntimeInformation.dll"
to
"bin\Debug\Dependencies\System.Runtime.InteropServices.RuntimeInformation.4.0.2.0\System.Runtime.InteropServices.RuntimeInformation.dll".
Exceeded retry count of 10. Failed.
Due to that error I can't build my solution no matter if I build in debug mode or release mode.
Try to Solve
At first I simply tried to clean the project and rebuild it
I also tried to clean the solution and rebuild the solution
At next I unloaded the project and reloaded it with and without dependencies
Than I tried to close VS2019 and reopened the project in combination with the previous parts
After that I tried to uncheck "allows NuGet to automatically check for missing packages during
build in Visual Studio" (Debug -> options)
Than I tried to build the project with all combinations of above
Than I tried the same but with Clear All NuGet Cache(s)
Than I tried to insert a prebuild action
if exist "$(TargetPath).locked" del "$(TargetPath).locked"
if not exist "$(TargetPath).locked" move "$(TargetPath)" "$(TargetPath).locked"
This throw me an error MSB3073 but without an error message and the description says:
MSB3073: The command "if exist "C:\Users\SpecificUser\source\repos\ProjectName\bin\Debug\ProjectName.dll.locked" del "C:\Users\SpecificUser\source\repos\ProjectName\bin\Debug\ProjectName.dll.locked"
Also, I made sure that the output path is clear
At next I tried to delete the bin folder and the obj folder.
All tis step have no success.
Additional Problem
Sometimes the dependencies would not load. For that I tried to reinstall them or reload the dependencies. Sometimes it works but usually not. Also, some References such as OpenTAP or Microsoft.CSharp has a yellow rectangular inside the symbol
yellow rectangular at reference
Used Recourses
OpenTAP SDK
OpenTAP lib
NetStandard lib
Microsoft.CSharp lib
Tried Solutions from StackOverflow
Could not copy "obj\Debug{project}.dll" to "bin{project}.dll"
visual studio 2013 Could not copy "obj\Debug.dll" to "bin\Debug.dll"
Error: Cannot access file bin/Debug/... because it is being used by another process
Unable to Copy File "*\bin\debug*.dll" to "bin*.dll" in Visual Studio
Error MSB3027: Could not copy "C:\pagefile.sys" to "bin\roslyn\pagefile.sys". Exceeded retry count of 10. Failed
Maybe someone can help me with my issue \^o^/
Just for everyone who is interested what is the solution.
The problem with I hade was, that Visual Studio has problems to solve the dependencies. Due to an test I tried to recreate an project on the same path and moved the old project to my desktop. Than to look at the code I opened the old project and after that it worked.
Solution
Visual Studio is not able to solve the dependencies when the path is to long. Now I have changed the path and it works.
I have a Xamarin project, which is based on MvvmCross. The project is for both iOS and Android. I opened this project in Visual Studio 15. I got some errors, which I solved in no time. There are some errors, which are stuck and I couldn't solve them even after searching on Google and on Stackoverflow. I have tried each and every method found on Stackoverflow, but still all remaining errors are there.
This project is using 3rd party libraries like RestSharp and BoxApi.V2 (few more)
I am posting my error log below.
Severity Code Description Project File Line Suppression State
Error The "ResolveLibraryProjectImports" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load assembly 'RestSharp(Android), Version=0.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist in the Mono for Android profile?
File name: 'RestSharp(Android).dll'
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.GetAssembly(String fileName)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Extract(DirectoryAssemblyResolver res, ICollection`1 jars, ICollection`1 resolvedResourceDirectories, ICollection`1 resolvedAssetDirectories, ICollection`1 resolvedEnvironments)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext() BoxApi.V2 (Android)
This error is repeating for all projects included in this solution. So I am getting this error multiple times.
I also want to add that the project was previously built on MAC and I am using windows, does this make some compatibility or cross OS issue?
I have checked all assembly references and all are working fine.
I've literally just had this with a brand new Xamarin.Forms application in Visual Studio 2017.
The root cause appears to be that I let VS2017 create the project in it's default location 'C:\Users\Dave\Documents\Visual Studio 2017\Projects' and this has resulted in one of more files now having a path which it too long.
I moved the solution to the root of my D drive and it builds without any problem.
Your issue is most likely linked to this post on the Xamarin forums, and this bugzilla entry. Without a reproducible sample, all I can advise you try is:
Updating Xamarin for Visual Studio, Xamarin.Android, and Xamarin.iOS
to the latest stable versions
Cleaning and rebuilding
Deleting all of the bin and obj folders from your project directories
Restarting Visual Studio/your PC
Failing all of that, there's not likely to be anyone who can help you without a reproducible sample and potentially your Xamarin logs.
edit your android project file (csproj) like below
this issue topic may guide https://github.com/xamarin/AndroidSupportComponents/issues/51
Had same problem. Here is my solution
Restart Visual Studio
Open the Project
Clean the solution
Rebuild the solution
Close solution
Reopen the project
I'm working with XAML (.xaml) and code-behind file (.xaml.cs). My issue was that I had the same page name, but under different namespaces. The XAML and the code behind file didn't match together. So finally it was an issue with my XAML, because of course it couldn't find the view element.
Well for me the problem was in my xaml file...
Somehow while setting the Layout bounds i used '.' as a separator instead of ','
e.g
AbsoluteLayout.LayoutBounds="0.5.0.3,1,0.3" should have been AbsoluteLayout.LayoutBounds="0.5,0.3,1,0.3"
Hence changing the '.' to ',' solved the problem
This happened to me when I accidentally installed nuget packages in a class library that was included in the solution. I just had to uninstall the packages from the class library project.
In my case, this issue came with another related to my xaml.
I had to solved the second in order this error dissapear. I clean up the class with a new default content and then clean all projects and solution. By last, close visual studio, open it , run the project and It works know .-.
This is still a fresh problem, after all attempts i wanted to try to shift the code to a shorter path - however that is lot of work as svn management will get complicated, so i wanted to first verify if path is really an issue, one way to do this was to check where the android SDKs are stored. I am on mac and the investigation revealed that SDKs path was longer than my project path. Plus i tried with a fresh project, and that was compiling correctly.
So i dropped the idea of shifting. Instead i used svn and compared what has changed since last correct build.
The comparison revealed that the project file of droid was somehow referring to the project file of iOS, it seems like some bug of Visual Studio. So i reverted the changes and than all got back to normal.
i get the same error and i usually solve this by closing all other opened xamarin solutions and there is one more way i had solved this issue -> go to taskmanager and find MSBUILD Service and end that service -> clean your solution -> Rebuild
We have encountered this too, it appears to be some type of race condition when building multiple projects and a very deep/complex dependency tree (our example has over 100 projects).
The only way we've been able to resolve this (beyond continually rebuilding) is to disable Visual Studio 2017's Parallel Build Abilities (Tools->Options->Projects and Solutions->Build and Run->"1" Maximum number of parallel project builds).
The problem appears to be in ResolveLibraryProjectImports.cs (https://github.com/xamarin/xamarin-android/blob/93ddf96f86710ad848d5189858567dd7fe964579/src/Xamarin.Android.Build.Tasks/Tasks/ResolveLibraryProjectImports.cs) there is most likely a race condition with their logic to shorten up the file names.
There are zero tests around this which means there is most likely some dodgy code.
I am going to attempt to dig more and get an issue opened up on GitHub but finding a reliable repo is probably going to be very difficult.
This worked for me:
Clean solution
Build one project at a time starting at the top - NOT rebuild solution - just one project at a time
Try deleting the contents of Obj and bin folder as well
When done delete the project from the emulator or device before you run it again
Hope this helps.
Still have issues ? Check your namespaces and your xaml code. Sometimes when you copy/paste some files, it can be the problem.
Not sure if it will help anyone of you. For my case, I comment the erroneous class (eg. those with missing references), and it will start to pick up everything and build again.
In my case, I just forgot to delete the clicked event in XAML that doesn't exist in my code behind(cs file). After that, I just clean and rebuild.
I think that error was caused by not updated references.
It's probably an issue with your references / reference assemblies?
If you look under each project's references folder in the solution explorer, any references that visual studio cannot find, delete and re-add them (right click reference folder to add).
I have Faced this issue a thousand times its actually a very simple thing when you create a new project visual studio creates it in C:Drive in its default folder all you have to do is move your project out in some other Drive Like D:, E: whatever just make sure to keep it in the root of your Drive i.e. If you move it in D: Then place it like this D/Project/solutionFile
Here is the problem:
System.IO.PathTooLongException: The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.
Try to move you project to another location like "C:/" , or change the name of the project for something more brief
I encountered the same issue and none of the solutions above worked. After noticing and error on the list regarding Cryptography I knew it had to be related to FIPS being enabled (required by a VPN client)
By disabling FIPS and restarting Visual Studio the issue was resolved.
I had this error as well. In my situation it was accompanied by Xamarin.Forms.Maps not importing into the one of the xaml.g.cs files correctly. I had all the using statements correct. The IDE was showing no errors but it kept telling me that Xamarin.Forms did not have a name space Map. It was generating in MapPage.xaml.g.cs as Xamarin.Forms.Map instead of Xamarin.Forms.Maps.Map and I couldn't force a fix manually. It turned out though that the suggested xmlns:maps for maps was causing the problem. The IDE had told me to use "http://xamarin.com/schemas/2014/forms" but the correct namespace is "clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps". After I changed this it was able to build my App1.dll
This was how I got the error. In a StackLayout I put in a Padding property, and I seperated the 4 digits by a space rather than a comma.
To find the bug I had to comment out the XAML controls individually and rebuild to isolate where the error is, and eventually I found the problem line.
So basically this was the error message I got for a syntax error in my XAML code!
In any other language I would expect to be informed what the error is so I can fix it in seconds. But this took me a few hours - although next time I know what to do.
This kind of issue may also come if by mistake you have any syntactical error like in my case: two text cells were present in the ListView -
<ListView x:Name="ProductsView">
<ListView.ItemTemplate>
<DataTemplate>
<TextCell Text="{Binding ProductId}" />
<TextCell Text="{Binding ProductDescription}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I went through other posts for this issue and found the same issue occurred due to the presence of syntactical errors, which VS doesn't report directly. So look for this, otherwise, reinstall the compatible version of xamarin.forms -> clean solutions -> rebuild by reopening VS.
I have faced the same problem today. After two days searching, I have found the solution here. The issue is Xamarin.Forms library does not install all its dependent Nuget packages while first creating project by choosing cross-platform Mobile(Xamarin.Forms) project template from Visual Studio 2017. I have to manually install the upgraded dependent nuget packages to build the project successfully. Also have removed and added Xamarin.Forms at the end which resolves the issue.
Also, it is some time creating issues when two instances of Visual Studio 2017 is running, make sure only one instance is only running as I have encountered this issue as well.
xmlns:maps="clr-namespace:Xamarin.Forms.Maps; assembly=Xamarin.Forms.Maps"
The problem was because of the space between the semicolon above and the assembly as stated above. As soon as the gap is closed, it compiles.
Shorteninig the path(folder names) to the solution solved it for me.
For example : the path was :
C:\Users\Username\Downloads\Compressed\ListView-GettingStarted-in-Xamarin-Forms-master\ListView-GettingStarted-in-Xamarin-Forms-master\GettingStarted
and i changed it to :
C:\Users\HelloKali\Downloads\Compressed\3\2\1.
All .cs file in my Xamarin project are Miscellaneous files http://prntscr.com/cp3q4w . I have no Quick Actions and Refactorings support, and it seems like there is somehow missing reference to Xamarin.Forms http://prntscr.com/cp3qzr ,but i dont get compile error for not recognizing xamarin components.
This is Xamarin.Forms Shared project.
Tried with this solution:
i) Clear the cache
ii) Open the solution
iii) Unload all projects
iv) Load Android project and then fix nuget references
v) Once the references were fixed, I loaded the shared project. Now everything seems to work.
But, didn't succeed.
Anyone had similar problem? Any suggestions for solution?
Thanks.
First thing to try if your solution is checked in to source control:
Do a full Git clean to make sure there are no left over files stopping compilation
Clear your NuGet cache. (How to clear NuGet package cache using command line?)
Try again.
If this fails, try this:
Starting a new Visual C# -> Cross Platform -> Mobile App (Xamarin.Forms) solution in Visual Studio 2017. I recommend trying a ".NET Standard" project rather than a "Shared Project".
Make sure the solution compiles and runs to make sure you have all the necessary components for Xamarin Installed.
Do a back up of this clean solution, or commit it to source control.
Upgrade all the NuGet packages if necessary
Pull all the files in from your old solution and see if you get the same problem. Just remember to make sure that the files are added as the correct type of file. For example xaml files must be set to "Embedded resource".
If you still have trouble, please post the error that you get, and upload your solution somewhere so we can have a look.
This also happened to me.
It still does every now and again.
These steps work for me:
Close your solution.
Delete the packages folder from your solution folder or just rename it to packages.old
Open your solution and restore the NuGet packages.
The new class will now show up correctly and your intellisense should work again.
Does anyone have an idea what could cause this though as I don't see any errors when building?
In Visual Studio 2010, I have just one project that cannot be published using the "Publish Now" button.
If I publish using the menu option instead, it works fine. I can then increment the version number, click "Publish Now" (or use "Publish Wizard..."), and get this error:
Cannot publish because a project failed to build.
However, no other error message is given. I managed to get screenshots of the output screen before it clears and flips to the Error List tab, but there is no mention there of any error. Clean & Rebuild doesn't fix the problem.
What do these two options do differently? Why is the build failing one way but not the other?
Since "rebuild solution" and "clean Solution" are not solving these issues, it might be either logs or assemblies in Bin.
This error seems to be caused by various issues :
Solution 1. set the build log verbosity to Diagnostic from the menu Tools->Options->Project and Solutions->Build and Run in Visual Studio 2010.
After that, if you build and publish your project, you can see the detailed build log from the Output window. From there, we should get futher information about why it failed to build.
Solution 2. Do you have Google Desktop by chance? If you do, close the sidebar and try once.
Solution 3. Click here for an another solution
Solution 4. Do you work with people from other timezones ? Files modified in future time may also cause this issue. check this utility
Solution 5.
I suggest you to try running the Visual Studio in safemode that will force the visual studio loading only the default environment and services, and shipped versions of third party packages. If the problem disappears you may stuck with some version of IDE tools with bugs. update them then.
If nothing seems to work, try this.
*Solution 6*
After researching it, it appears that the built in build/publish script that Visual Studio (2010 in our case) uses has a flaw in the order that it does things. Most importantly it runs a cleanup on the OBJ directory deleting the target EXE file before the publish step can grab it.
The solution
This is somewhat of a hacky workaround, but it solved the problem for me.
The fix is to copy the file back to the /obj/ folder from the /bin/ folder right before the publish step. Unfortunately there is no way that I know to specify a BeforePublish event through the IDE, so you will have to edit the .vbproj file in a text editor.
Add the following section just before the final tag.
<Target Name="BeforePublish">
<Copy SourceFiles="$(TargetPath)" DestinationFolder="$(IntermediateOutputPath)" />
</Target>
Clean and Rebuild worked for me. It seems like Google desktop and some browser extenstions causing this bug often. looking for a security update is good way to go with this.
I eventually created a new branch, and that branch did not have this problem. I never discovered what the actual cause was.