Unable to build a console application in ASP.NET 5 dnx

Question

I am unable to build the following application on Debian with Visual Studio Code. What am I missing?

project.json

{
  "version": "1.0.0-*",
  "description": "ParseAB2Steps Console Application",
  "authors": [ "" ],
  "tags": [ "" ],
  "projectUrl": "",
  "licenseUrl": "",
  "tooling": {
    "defaultNamespace": "ParseAB2Steps"
  },

  "dependencies": {
  },

  "commands": {
    "ParseAB2Steps": "ParseAB2Steps"
  },

  "frameworks": {
    "dnx451": { },
    "dnxcore50": {
      "dependencies": {
        "Microsoft.CSharp": "4.0.1-beta-23516",
        "System.Collections": "4.0.11-beta-23516",
        "System.Console": "4.0.0-beta-23516",
        "System.Linq": "4.0.1-beta-23516",
        "System.Threading": "4.0.11-beta-23516",
        "System.IO": "4.0.11-beta-23516"
      }
    }
  }
}

Program.cs

using System;
using System.IO;

namespace ParseAB2Steps
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Press enter to read ab2steps.md");
            Console.Read();

            string ab2steps = File.ReadAllText("/home/ab2/Dropbox/nodes/ab2/ab2-steps.md");
        }
    }
}

I get this error on dnu build :

/home/ab2/projects/ParseAB2Steps/Program.cs(13,31): DNXCore,Version=v5.0 error CS0103: The name 'File' does not exist in the current context

Build failed.

Note: I put the System.IO line in the project.json manually by copying the version from the previous line and was able to do the dnu restore successfully.

I am also aware of the new dotnet cli and I did not upgrade to it as Debian is not directly supported as far as I know. So, I am using the dnx environment which I currently have.

Edit 2:

Output of dnvm list

Active Version              Runtime Architecture OperatingSystem Alias
------ -------              ------- ------------ --------------- -----
       1.0.0-rc1-update1    coreclr x64          linux           
  *    1.0.0-rc1-update1    mono                 linux/osx       default
       1.0.0-rc2-16312      mono                 linux/osx       

Answer 1

Changing the dependency from System.IO to System.IO.FileSystem did the trick for me.

You can leave System.IO in the file as well, but it's brought in anyway since it's a dependency of a few of the other assemblies, including System.Console and System.IO.FileSystem .