备考AZ-204：.NET 8构建Azure Blob存字符串C#项目编译报错求助

Java开发者备考AZ-204证书时，使用ChatGPT生成了一个极简.NET C#项目（实现字符串写入Azure Blob存储），已安装.NET 8 SDK，但执行dotnet build -o out命令时触发NU1100错误，无法解析指定NuGet包及.NET 6框架依赖，项目结构需保持极简。

原项目文件、代码及报错信息如下：

原项目文件 #

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <UseWPF>false</UseWPF>
    <UseWindowsForms>false</UseWindowsForms>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Azure.Storage.Blobs" Version="12.10.0" />
    <PackageReference Include="Microsoft.Azure.Identity" Version="1.7.0" />
  </ItemGroup>

</Project>

原C#代码文件 #

using System;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Azure.Identity;
using Azure.Storage.Blobs;

class Program
{
    static async Task Main(string[] args)
    {
        // Replace these values with your actual Azure Blob Storage information
        var blobStorageUrl = "https://somestorage.blob.core.windows.net/";
        var containerName = "somecontainer1";
        var blobName = "vm1example.txt"; // Name of the file in Blob Storage

        // Create a token credential using the system-assigned managed identity
        var tokenCredential = new DefaultAzureCredential();

        // Create a BlobServiceClient using the token credential
        var blobServiceClient = new BlobServiceClient(new Uri(blobStorageUrl), tokenCredential);

        // Get a reference to the container
        var blobContainerClient = blobServiceClient.GetBlobContainerClient(containerName);

        // Create or get a reference to the blob
        var blobClient = blobContainerClient.GetBlobClient(blobName);

        // Specify the content to write to the blob
        var content = "Hello, Azure Blob Storage!";

        // Convert the content to bytes
        var contentBytes = Encoding.UTF8.GetBytes(content);

        // Create a stream from the content bytes
        using (var stream = new MemoryStream(contentBytes))
        {
            // Upload the content to the blob
            await blobClient.UploadAsync(stream, true);
        }

        Console.WriteLine("String written to Blob Storage successfully.");
    }
}

编译报错信息 #

C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Azure.Storage.Blobs (>= 12.10.0)' for 'net6.0'.
C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Microsoft.Azure.Identity (>= 1.7.0)' for 'net6.0'.
C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Microsoft.NETCore.App.Ref (= 6.0.25)' for 'net6.0'.
C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Microsoft.WindowsDesktop.App.Ref (= 6.0.25)' for 'net6.0'.
C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Microsoft.AspNetCore.App.Ref (= 6.0.25)' for 'net6.0'.
C:\programas\writeblobfile.csproj : error NU1100: Unable to resolve 'Microsoft.NETCore.App.Host.win-x64 (= 6.0.25)' for 'net6.0'.
0 Warning(s)
6 Error(s)

1. 调整项目目标框架与NuGet包版本 #

将项目目标框架改为net8.0（匹配已安装的SDK），同时更新NuGet包到兼容.NET 8的稳定版本，替换旧版Microsoft.Azure.Identity为新版Azure.Identity（包命名已标准化），移除不必要的WPF/WinForms配置项：

修改后的.csproj文件：

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Azure.Storage.Blobs" Version="12.20.0" />
    <PackageReference Include="Azure.Identity" Version="1.12.0" />
  </ItemGroup>

</Project>

2. 清理缓存并重新还原依赖 #

执行以下命令清除本地编译缓存，重新获取依赖包：

dotnet clean
dotnet restore

3. 重新编译项目 #

执行编译命令：

dotnet build -o out

4. 代码说明 #

原C#代码无需修改，仅需将blobStorageUrl、containerName替换为自己的Azure Blob存储实例信息即可运行。

内容的提问来源于stack exchange，提问作者sekelsenmat