在.NET Core 2.0 Web应用中使用非对称密钥报错求解决方法

Hey there! Let's work through this .NET Core 2.0 issue step by step. Here are some actionable troubleshooting ideas to get your sample code running smoothly:

• Pin down the exact error details first
  Vague "it failed" messages won't cut it. Capture the full exception stack trace, error codes, or console output from the runtime. In Visual Studio, check the Output window (set to "Debug" output) or wrap the problematic code in a try-catch block to log Exception.ToString()—this will tell you exactly where things break (missing dependencies, null references, misconfiguration, etc.).

• Verify your .NET Core 2.0 environment setup
  Confirm you have the correct SDK installed by running dotnet --version in your terminal. Check your project's .csproj file to ensure <TargetFramework> is set to netcoreapp2.0 and there are no conflicting framework references. If you're using a newer SDK, add a <RuntimeFrameworkVersion> element to lock into a specific 2.0.x release to avoid compatibility gaps.

• Audit NuGet package compatibility
  Sample code often relies on specific package versions that might not support .NET Core 2.0. Go through your .csproj package references—look for packages marked as incompatible with netcoreapp2.0. Run dotnet restore to ensure all dependencies are installed, and update any packages that have known 2.0 compatibility fixes (but avoid versions that drop 2.0 support entirely).

• Validate configuration settings
  .NET Core 2.0 leans heavily on appsettings.json and environment variables. If your sample uses database connections, API keys, or service endpoints, double-check these values are correctly set. Ensure your Startup.cs loads configuration properly—for example, using ConfigurationBuilder to include appsettings.json and environment-specific files.

• Build a minimal reproduction
  Strip the sample code down to the smallest version that still triggers the error. Remove unnecessary controllers, services, or middleware. This isolates whether the issue is with a specific code segment or a broader environment/configuration problem. For example, if the error happens when calling a service, test that service in a minimal console app to see if it works outside the web app context.

• Check for .NET Core 2.0 breaking changes
  If the sample was written for .NET Core 1.x, there might be breaking changes causing issues. Common culprits include altered middleware registration, deprecated IHostingEnvironment APIs, or changes to dependency injection setup. Review the .NET Core 2.0 migration guide to spot obsolete code patterns in the sample.

• Enable verbose logging
  Turn on debug-level logging to see what's happening before the error. In Startup.cs, configure logging to capture detailed runtime steps:

  public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
  {
      loggerFactory.AddDebug(LogLevel.Debug);
      // ... rest of your configuration logic
  }
  

  This will reveal hidden issues like failed service registrations or missing configuration values.

内容的提问来源于stack exchange，提问作者MHugh