添加NuGet包时抛出异常问题咨询（Visual Studio 2017 Pro）

Hey there! Since you didn’t share the exact error message you’re getting when adding NuGet packages in Visual Studio 2017 Pro, I’ll walk you through the most common fixes that resolve most NuGet-related issues in this version. Let’s dive in:

• 清理NuGet缓存
  Corrupted NuGet cache is one of the most frequent culprits. Here’s how to fix it:

  1. Open Visual Studio, go to Tools > NuGet Package Manager > Package Manager Settings
  2. In the popup window, select NuGet Package Manager > General, then click the Clear All NuGet Cache(s) button
  3. Restart Visual Studio and try installing the package again

• Verify NuGet source configuration
  Invalid or blocked package sources often cause installation failures:

  1. Go to Package Manager Settings > Package Sources
  2. Make sure the official nuget.org source is enabled (check the box next to it) with the correct URL: https://api.nuget.org/v3/index.json
  3. Temporarily disable any third-party sources to rule out conflicts, then retry the installation

• Repair your Visual Studio installation
  Damaged VS components can break NuGet functionality:

  1. Launch the Visual Studio Installer, find your VS2017 Pro instance, and click Modify
  2. Navigate to Individual components, locate NuGet package manager—if it’s already checked, uncheck it, click Modify, then re-check it and run the modification again
  3. Wait for the repair to finish, then restart VS

• Install packages via Package Manager Console
  If the UI installation fails, try the command line approach:

  1. Open Tools > NuGet Package Manager > Package Manager Console
  2. Run the command: Install-Package [YourPackageName] (replace [YourPackageName] with the actual package you want to install)
  3. The console will output detailed error messages, which can help pinpoint the exact issue

• Check project file permissions and integrity
  Locked or corrupted project files might be the problem:

  1. Close Visual Studio, navigate to your project folder, right-click it and select Properties—ensure your user account has Read/Write permissions
  2. Delete the packages folder and the hidden .vs folder in your project directory, then reopen the project and try restoring packages again

If none of these steps work, please share the exact error message or code you’re seeing—this will let me give you a more targeted solution!

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