Issue Debugging .NET Core Application in Visual Studio Code

08 Jun 2016

Two of the many things that I enjoy are Visual Studio Code and .NET Core. Recently I’ve been using VS Code to develop my .NET Core apps, and I’ve been running into a funny issue. Basically when I would create a .NET Core app and run it (or try to debug it) I would get the following error…

WARNING: Could not load symbols for ‘core-test-03.dll’. ‘d:\development\dotnet\core\core-test-03\bin\Debug\netcoreapp1.0\core-test-03.pdb’ is a Windows PDB. These are not supported by the cross-platform .NET Core debugger.

Hello World!

The program ‘d:\development\dotnet\core\core-test-03\bin\Debug\netcoreapp1.0\core-test-03.dll’ has exited with code 0 (0x00000000).

This is a plain .NET Core app that was created with dotnet new and then F5’d in Visual Studio Code.

Likewise, if I set a breakpoint in the source, it isn’t hit. Which is a larger problem when trying to debug your app.

using System;

namespace ConsoleApplication
    public class Program
        public static void Main(string[] args)
            Console.WriteLine("Hello World!"); // set breakpoint here, won't be hit

The good news is that this is a very easy fix. All you have to do is navigate to project.json and add the "debugType": "portable" to buildOptions. Once I added that single configuration option I no longer received this warning when debugging my .NET Core app in Visual Studio Code.