VS Community 2022 - ASP.NET 4.8 - Publish has encountered an error. Copying file 'x' to 'y' failed.

Antony Cartwright 0

Hello, I'm getting a really frustrating error which is really holding me up.

The error is:

Copying file

packages\Microsoft.Extensions.DependencyInjection.Abstractions.7.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets

C:\Users\Administrator\AppData\Local\Temp\2\WebSitePublish\EPHB2--227909753\obj\Debug\Package\PackageTmp\packages\Microsoft.Extensions.DependencyInjection.Abstractions.7.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets

failed.

Could not find a part of the path

'C:\Users\Administrator\AppData\Local\Temp\2\WebSitePublish\EPHB2--227909753\obj\Debug\Package\PackageTmp\packages\Microsoft.Extensions.DependencyInjection.Abstractions.7.0.0\buildTransitive\netcoreapp2.0\Microsoft.Extensions.DependencyInjection.Abstractions.targets'.

A nuget package has imported this file on my behalf. When I look in the path, it's correct that the file 'Microsoft.Extensions.DependencyInjection.Abstractions.targets' doesn't exist.

Please help! :-)

AgaveJoe 26,186 Reputation points

2023-06-07T18:13:03.9833333+00:00

You've made a reference to .NET Core from a .NET Framework 4.8 project. Remove the .NET Core references.
Lan Huang-MSFT 25,386 Reputation points Microsoft Vendor

2023-06-08T09:50:58.75+00:00

Hi @Antony Cartwright

After you deleted file from folder (Not in the visual studio) usually become this error message. the reason for your "projectname.csproj" file already recorded your deleted file reference.

or if you can see file in the project, You can right click on the file and Exclude file from the project.
Antony Cartwright 0 Reputation points

2023-06-08T10:02:22.6833333+00:00

So, the problem was that a nuget pulled in a reference for a dll (or whatever) which is not compatible with the system/framework.

I rolled back the package so that it pulled in a reference for a dll which was compatible. I think it's something to do with .net core/.net framework.
Bryce Pfrimmer 0 Reputation points

2023-07-27T21:12:59.5166667+00:00
I'm having the exact same error. I'm trying to use MSAL libraries in an ASP.NET web project. I'm following an MS 'quickstart' guide, it states that you need to install 3 nuget packages:

Install-Package Microsoft.Identity.Web.Owin

Install-Package Microsoft.Identity.Web.GraphServiceClient

Install-Package Microsoft.Owin.Security.Cookies With their dependencies, these 3 packages end up install quite a few other packages, 4 of which I believe are applicable only to ASP.NET Core:

Microsoft.AspNetCore.Cryptography.Internal

Microsoft.AspNetCore.DataProtection

Microsoft.AspNetCore.DataProtection.Abstractions

Microsoft.NETCore.Platforms I have a packages.config that has the target framework as net48:

<package id="Microsoft.AspNetCore.Cryptography.Internal" version="7.0.8" targetFramework="net48" /> <package id="Microsoft.AspNetCore.DataProtection" version="7.0.8" targetFramework="net48" /> <package id="Microsoft.AspNetCore.DataProtection.Abstractions" version="7.0.8" targetFramework="net48" /> <package id="Microsoft.NETCore.Platforms" version="7.0.3" targetFramework="net48" />

Maybe changing targetFramework="netstandard2.0;net48" would fix it? Or targetFramework="netstandard2.0"?

What do you mean by: "rolled back the package"? You rolled back the version of those 3 initial packages? Or of the package that had the dependency to the .NETCore specific package?