.NET Version Upgrade Help

[geniue-net]

Body

Hi everyone,

I am a .NET Developer and am working on .NET Core Backend Project
The current project is using .NET version 6.0 and I want to upgrade it to .NET version 8.0
I changed csproj files and upgraded the versions of all packages and it was working well on my local
When I tried to deploy it using TeamCity, it caused errors
Does anyone can help me?

Best,
Fun-Minion

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[Will-Ostrick]

Hi Fun-Minion,

I actually has similar issue awhile back, I went searching through some of the docs i had that helped me sort it out, Admittedly i'm doing a little of this from memory... Hop it helps :)

1: Verify TeamCity Configuration

Ensure that TeamCity agents have the .NET 8 SDK installed:
On the TeamCity Agent, run: dotnet --list-sdks
If .NET 8 SDK is missing, install it from: https://dotnet.microsoft.com/download/dotnet/8.0

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2: Check TeamCity Build Steps
Ensure your TeamCity build steps explicitly use .NET 8:

• Go to TeamCity Project Settings.
• Navigate to your build configuration.
• Update ".NET CLI version" or "MSBuild Tools Version" to point to .NET 8 SDK.

Example:
dotnet publish MyProject.sln --configuration Release -r win-x64 --self-contained false

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3: Update NuGet Restore Step
Ensure NuGet restore compatibility with .NET 8:

• Run: dotnet restore MyProject.sln

To force clear previous caches, consider: dotnet restore MyProject.sln --force

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4: Confirm TeamCity Tools Path
Check TeamCity's Tools path points explicitly to the .NET 8 SDK:

• TeamCity Administration > Tools
• Ensure DOTNET_ROOT is set correctly, e.g.:
  DOTNET_ROOT = C:\Program Files\dotnet

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5: Clean and Rebuild
Perform a clean checkout in TeamCity:

• Go to "Version Control Settings".
• Choose "Clean Checkout".

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6: Check for Breaking Changes
Check official .NET upgrade documents for breaking changes between versions:

• .NET 7 Breaking Changes:
  

• .NET 8 Breaking Changes:
  

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7: Inspect Build Logs for Specific Errors

Review TeamCity build logs carefully:

Common issues include:

• NuGet package incompatibility
• SDK mismatches

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8: Update TeamCity Agent

Ensure your TeamCity server and agent are updated to the latest version for complete .NET 8 support.

These were some old notes, as i said hopefully they help a little

[geniue-net]

Hello @Will-Ostrick
Sorry for my late, and thanks for your help!
It worked
Hope to get contact with you
My gmail is bobrichard88019@gmail, telegram is @sinbad0825
Best,
Bob