Azure Pipeline 在 dotnet 构建中失败，需要升级到最新的 .net 核心版本答案

【问题标题】：Azure Pipeline Failing in dotnet build, need to upgrade to latest .net core versionAzure Pipeline 在 dotnet 构建中失败，需要升级到最新的 .net 核心版本
【发布时间】：2020-12-15 22:17:29
【问题描述】：

我在 Azure Pipeline 中部署 .Net Core API 时遇到问题。

构建失败，因为最近 API 已从 .Net Core 3.1 升级到 .Net Core 5.0。

如何在已部署的 API 中升级版本？

构建因此而失败。

    2020-12-15T17:28:36.4659829Z Welcome to .NET Core 3.1!
2020-12-15T17:28:36.4663885Z ---------------------
2020-12-15T17:28:36.4664170Z SDK Version: 3.1.404
2020-12-15T17:28:36.4664326Z 
2020-12-15T17:28:36.4664473Z Telemetry
2020-12-15T17:28:36.4664777Z ---------
2020-12-15T17:28:36.4665979Z The .NET Core tools collect usage data in order to help us improve your experience. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.
2020-12-15T17:28:36.4666549Z 
2020-12-15T17:28:36.4667054Z Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry
2020-12-15T17:28:36.4667516Z 
2020-12-15T17:28:36.4667822Z ----------------
2020-12-15T17:28:36.4668277Z Explore documentation: https://aka.ms/dotnet-docs
2020-12-15T17:28:36.4668662Z Report issues and find source on GitHub: https://github.com/dotnet/core
2020-12-15T17:28:36.4669205Z Find out what's new: https://aka.ms/dotnet-whats-new
2020-12-15T17:28:36.4669786Z Learn about the installed HTTPS developer cert: https://aka.ms/aspnet-core-https
2020-12-15T17:28:36.4673694Z Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs
2020-12-15T17:28:36.4678355Z Write your first app: https://aka.ms/first-net-core-app
2020-12-15T17:28:36.4678944Z --------------------------------------------------------------------------------------
2020-12-15T17:28:36.7880706Z Microsoft (R) Build Engine version 16.7.1+52cd83677 for .NET
2020-12-15T17:28:36.7881990Z Copyright (C) Microsoft Corporation. All rights reserved.
2020-12-15T17:28:36.7882687Z 
2020-12-15T17:28:37.4462789Z   Determining projects to restore...
2020-12-15T17:28:44.3820962Z   Restored /home/vsts/work/1/s/SynApi/SynApi.csproj (in 6.57 sec).
2020-12-15T17:28:45.1453408Z /home/vsts/work/1/s/Api/Api.csproj : warning NU1604: Project dependency Microsoft.AspNetCore.App does not contain an inclusive lower bound. Include a lower bound in the dependency version to ensure consistent restore results. [/home/vsts/work/1/s/Api.sln]

2020-12-15T17:28:45.5916387Z   Failed to restore /home/vsts/work/1/s/SynApi/SynApi.csproj (in 7.85 sec).
2020-12-15T17:28:45.6085564Z 
2020-12-15T17:28:45.6087169Z Build FAILED.

【问题讨论】：

你能分享更多细节吗？你还没有告诉我们你的项目是什么样的，你的天蓝色管道 yaml 是什么样的或任何东西。帮助我们帮助您，并请发布一个最小的独立示例来重现该问题。
您是否将应用程序升级到 .NET 5？
我在本地将我的应用程序升级到了 .NET 5，但是当我升级到 master 时，构建并没有反映出这一点。我刚刚用部署日志更新了问题
如果您使用的是声明式管道。这应该有助于stackoverflow.com/questions/64830501/…

标签： c# azure asp.net-core .net-core azure-devops

【解决方案1】：

Azure 还没有附带 .Net 5。在管道的开头插入一个新步骤以安装 .Net 5：

  - task: UseDotNet@2
    displayName: .Net 5
    inputs:
      version: 5.0.100

或者，如果您使用的是经典图形界面，请添加步骤 Use .NetCore 并确保您使用正确的版本。截至今天，它是 5.0.100。

【讨论】：