Question

我一直在尝试使用.NET Core CLI工具学习.NET Core编程的基础知识。我下载了适用于Windows 1.0.1版的.NET Core SDK，并按照下载页面（https://www.microsoft.com/net/core#windows）上的简单说明进行操作：

mkdir hwapp
cd hwapp
dotnet new
dotnet restore
dotnet run

这在我的Windows 10，x64计算机上编译并运行良好。

当我尝试在同一个应用程序中定位.NET Framework 4.6.2时遇到了麻烦。根据我的阅读，我只需添加一个值为＆＃34; net462＆＃34;在＆＃34;框架下＆＃34;节点：

{
  "net462": {}
}

然而，在添加此节点，运行dotnet还原，然后运行dotnet build CLI命令后，我收到以下错误：

Project hwapp (.NETFramework,Version=v4.6.2) will be compiled because expected outputs are missing
Compiling hwapp for .NETFramework,Version=v4.6.2
C:\Program Files\dotnet\dotnet.exe compile-csc @C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.rsp returned Exit Code 1
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(2,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(3,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(4,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(5,11): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(2,58): error CS0518: Predefined type 'System.String' is not defined or imported
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(3,54): error CS0518: Predefined type 'System.String' is not defined or imported
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(4,67): error CS0518: Predefined type 'System.String' is not defined or imported
C:\Development\dotNet\hwapp\obj\Debug\net462\dotnet-compile.assemblyinfo.cs(5,62): error CS0518: Predefined type 'System.String' is not defined or imported
C:\Development\dotNet\hwapp\Program.cs(1,7): error CS0246: The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)
C:\Development\dotNet\hwapp\Program.cs(5,18): error CS0518: Predefined type 'System.Object' is not defined or imported
C:\Development\dotNet\hwapp\Program.cs(7,33): error CS0518: Predefined type 'System.String' is not defined or imported
C:\Development\dotNet\hwapp\Program.cs(7,23): error CS0518: Predefined type 'System.Void' is not defined or imported

Compilation failed.
    0 Warning(s)
    12 Error(s)

正如您可以从输出中读取的那样，当面向.NET Framework 4.6.2时，编译器似乎无法找到System命名空间。当我尝试使用早期的.NET框架（如4.6.1和4.5.2）时，会出现同样的错误。

我尝试将G64版本的System.dll和mscorlib.dll的副本从GAC移动到C：\ Program Files \ dotnet \目录，以便csc.exe程序可以找到System命名空间但没有成功

如果它有用，请在下面找到我的project.json文件的内容：

{
  "version": "1.0.0-*",
  "buildOptions": {
    "debugType": "portable",
    "emitEntryPoint": true
  },
  "dependencies": {},
  "frameworks": {
    "net462": {},
    "netcoreapp1.0": {
      "dependencies": {
        "Microsoft.NETCore.App": {
          "type": "platform",
          "version": "1.0.1"
        }
      },
      "imports": "dnxcore50"
    }
  }
}

非常感谢任何帮助！

Answer 1

如果您想定位.Net 4.6.2，则需要安装.NET Framework 4.6.2 Developer Pack。

构建面向完整.NET框架4.6.2的默认.NET Core控制台应用程序时出错

1 个答案: