开发阶段Web API无需反复编译的实现技巧求助

Ah, I feel your pain—having to recompile every time you tweak a line of code is such a productivity killer when you're in the flow of development. Let's break down your options here, depending on how much you want to adjust your current setup:

1. 迁移到ASP.NET Core（最优长期方案） #

If you're open to updating your project stack, ASP.NET Core is designed specifically to fix this exact frustration. It includes built-in Hot Reload that applies code changes in real-time without requiring a full recompile or server restart. Here's how it works:

• Create a new ASP.NET Core Web API project in Visual Studio (or via the dotnet new webapi command).
• Migrate your existing controllers, business logic, and dependencies over to the new project—most C# code will port over smoothly, though you'll need to adjust configuration (like replacing WebApiConfig with Program.cs setup).
• When developing, either:
  • Use Visual Studio's debug mode with Hot Reload enabled (it's on by default in recent versions; look for the "Hot Reload" button in the debug toolbar).
  • Run the project via the command line with dotnet watch run—this will automatically detect code changes, apply them, and refresh the server.
• Deploying to local IIS still works seamlessly with ASP.NET Core, so you won't lose your current deployment workflow.

2. 启用“编辑并继续”（针对现有传统ASP.NET Web API） #

If you want to stick with your current project setup, you can use Visual Studio's Edit and Continue feature to avoid full recompiles for most code tweaks. Here's how to set it up:

• Right-click your ASP.NET Web Application project → Properties → go to the Web tab.
• Check the box for Enable Edit and Continue.
• Start debugging your project (press F5). Now, when you modify code inside existing methods (like controller actions or service logic), you can:
  • Click the Continue button in the debug toolbar (or press Ctrl+Shift+F10) to apply the changes without stopping and restarting the debugger.
• Note: This won't work for all changes—adding new controllers, modifying class signatures, or changing configuration files will still require a recompile. But for iterative tweaks to existing code, it's a huge time-saver.

3. 动态编译（进阶/小众场景） #

For more advanced scenarios, you could use Roslyn (the .NET compiler platform) to dynamically compile parts of your code at runtime. This is more complex, but allows you to update business logic without recompiling the entire project. However, I only recommend this if you have specific constraints that prevent the above two options—since it adds complexity to your project structure and maintenance.

内容的提问来源于stack exchange，提问作者m3rt_ali