利用.NET Upgrade Assitant对项目进行升级

本教程演示如何把WPF程序从 <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>升级到<TargetFramework>net8.0-windows</TargetFramework>.

下载并安装.NET Upgrade Assistant - Visual Studio Marketplace

Supported .NET upgrades:

• .NET Framework to .NET 6+ (including .NET 9.0 Preview)
• .NET Core to .NET 6+ (including .NET 9.0 Preview)
• Any .NET version to .NET 6+ (including .NET 9.0 Preview) that is higher than the current version
• Azure Functions v1, v2, v3 to v4 isolated (targeting net6.0 or net7.0)
• Xamarin.Forms to MAUI
  • Note: For Xamarin->MAUI .xaml file transformations the Upgrade Assistant includes basic namespace replacements. More comprehensive .xaml file transformations require Visual Studio 17.6.

Supported project types:

• ASP.NET
• Azure Functions
• WPF
• WinForms
• Class libraries
• Console
• Xamarin.Forms
• .NET MAUI
• UWP

Coming soon:

• WCF to WCF Core upgrade

以上更新信息可在.NET Upgrade Assistant - Visual Studio Marketplace中获取到。

安装过程会默认勾选已安装的Visual Studio版本，我本机用的vs2022 Community版本。

安装成功后，打开你的项目，右击选择项目进行升级。

具体步骤如下图所示：

建议更新到LTS版本。

需要一个项目一个项目的升级，升级完成后如果出现引用错误，可重新添加项目间的引用，然后Clean下Solution，rebuild即可。

PS：Upgrade总共有三种方式，可根据自己项目情况进行选择。默认推荐In-place project upgrade。