dotnet_sln_files

Dockerfile

# build stage
FROM microsoft/dotnet:2.0.0-preview1-sdk-jessie AS build-env
ADD . /app
WORKDIR /app/
RUN dotnet restore
RUN dotnet publish  -c Release
# final stage
FROM microsoft/dotnet:2.0.0-preview1-runtime-jessie
COPY --from=build-env /app /app/
WORKDIR /app/
ENTRYPOINT ["dotnet", "proj1/bin/Release/netcoreapp2.0/proj1.dll"]

Program_proj1.cs

using System;
using proj2;

namespace proj1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            var p = new proj2.Program();
        }
    }
}

Program_proj2.cs

using System;
namespace proj2
{
    public class Program
    {
        public Program()
        {
            Console.WriteLine("Hello World from proj2 constructor!");
        }
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World from proj2 main!");
        }
    }
}

proj1.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <ItemGroup>
    <ProjectReference Include="../proj2/proj2.csproj" />
  </ItemGroup>
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="proj2" Version="1.0.*" />
  </ItemGroup>
</Project>

proj2.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>
</Project>

testsln.sln

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.26124.0
MinimumVisualStudioVersion = 15.0.26124.0
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj1", "proj1\proj1.csproj", "{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj2", "proj2\proj2.csproj", "{61325309-2712-49A9-BAC8-CD58E00629B6}"
EndProject
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Debug|Any CPU = Debug|Any CPU
		Debug|x64 = Debug|x64
		Debug|x86 = Debug|x86
		Release|Any CPU = Release|Any CPU
		Release|x64 = Release|x64
		Release|x86 = Release|x86
	EndGlobalSection
	GlobalSection(SolutionProperties) = preSolution
		HideSolutionNode = FALSE
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|x64.ActiveCfg = Debug|x64
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|x64.Build.0 = Debug|x64
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|x86.ActiveCfg = Debug|x86
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Debug|x86.Build.0 = Debug|x86
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|Any CPU.Build.0 = Release|Any CPU
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|x64.ActiveCfg = Release|x64
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|x64.Build.0 = Release|x64
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|x86.ActiveCfg = Release|x86
		{0DFF0301-D05C-4AF0-8FCF-CC40ED1EE6B0}.Release|x86.Build.0 = Release|x86
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|x64.ActiveCfg = Debug|x64
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|x64.Build.0 = Debug|x64
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|x86.ActiveCfg = Debug|x86
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Debug|x86.Build.0 = Debug|x86
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|Any CPU.Build.0 = Release|Any CPU
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|x64.ActiveCfg = Release|x64
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|x64.Build.0 = Release|x64
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|x86.ActiveCfg = Release|x86
		{61325309-2712-49A9-BAC8-CD58E00629B6}.Release|x86.Build.0 = Release|x86
	EndGlobalSection
EndGlobal