The located assembly's manifest definition does not match the assembly reference

[#1]

I am trying to learn the SDK for Qlik. I am not good at C# nor familiar with VS Code, the tool i am using right now.

Here's the short code:

using System;

using Qlik.Engine;

namespace test

{    static class Program

  {  static void Main()

  {  ILocation local = Qlik.Engine.Location.FromUri(new Uri("http://localhost:4848/"));

}}}

I am compiling a short script for .NETCoreApp,Version=v1.1.

I got the following error:

Unhandled Exception: System.IO.FileLoadException: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral

, PublicKeyToken=b77a5c561934e089'. The located assembly's manifest definition does not match the assembly reference. (Exce

ption from HRESULT: 0x80131040)

   at Examples.Reload.Sync.Program.Main()

I am not sure where i might have gone wrong? Thank you for your help.