I am migrating application from dot net 4.8 to dot net core 8. facing error Project ..\folder\folder.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

Question

I am migrating application from dot net 4.8 to dot net core 8. facing error Project ..\folder\folder.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

Sayali Mahale 20

I am migrating application from dot net 4.8 to dot net core 8.

facing error Project ..\folder\folder.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

Project ..\folder1\folder1.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

Project ..\folder2\folder2.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

all errors are in Folder3 project, which depends on folder, folder1 and folder2.

folder, folder1 and folder2 are migrated in dot net core.

Viorel 125.7K Reputation points

2025-01-03T11:58:29.49+00:00

If Folder3 is needed, maybe the Folder3 must be migrated too.
Sayali Mahale 20 Reputation points

2025-01-03T12:01:30.5266667+00:00

yes, that I have started with migration. targetframework for folder3 is net8.0, still the same error.
Viorel 125.7K Reputation points

2025-01-03T12:08:30.01+00:00

According to error message, the Folder3 is still based on .NET Framework. Maybe there is another Folder3 or it was not adjusted correctly yet.
Sayali Mahale 20 Reputation points

2025-01-07T13:13:21.54+00:00

I have another one question,

I have run upgrade assistant on my API project to convert it to dot net core 8. I have modified csproj file.
But when I am trying to run upgrade assistant on single controller. It is not showing controller in controller's dropdown. whereas it is showing classes and views in drop down in respective dropdowns.
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Viorel 125.7K Reputation points

2025-01-03T11:58:29.49+00:00

If Folder3 is needed, maybe the Folder3 must be migrated too.
Sayali Mahale 20 Reputation points

2025-01-03T12:01:30.5266667+00:00

yes, that I have started with migration. targetframework for folder3 is net8.0, still the same error.
Viorel 125.7K Reputation points

2025-01-03T12:08:30.01+00:00

According to error message, the Folder3 is still based on .NET Framework. Maybe there is another Folder3 or it was not adjusted correctly yet.
Sayali Mahale 20 Reputation points

2025-01-07T13:13:21.54+00:00

I have another one question,

I have run upgrade assistant on my API project to convert it to dot net core 8. I have modified csproj file.
But when I am trying to run upgrade assistant on single controller. It is not showing controller in controller's dropdown. whereas it is showing classes and views in drop down in respective dropdowns.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 1

Bruce (SqlWork.com) 82,066 Volunteer Moderator

.net 4.8 projects cannot reference .net core libraries, nor can .net core call 4.8 project libraries. This means to migrate to .net 8 you need to update every project in the solution to .net 8.

an alternative is is to update all libraries to .net standard 2.0. These are callable from both .net 4.8 and .net 8. This can be done a project at a time. When all libraries have been migrated, the the main project(s) can be migrated to .net 8

Sayali Mahale 20 Reputation points

2025-01-07T13:09:44.1866667+00:00

actually there was issue in csproj file, which was not properly migrated to dot net core 8.
that issue has been resolved after making some changes in csproj.

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I am migrating application from dot net 4.8 to dot net core 8. facing error Project ..\folder\folder.csproj targets net8.0. It cannot be referenced by a project that targets .NETFramework,Version=v4.8.

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