{
    "dependencies": {
        "MailKit": "1.10.0"
    }
}

using System.Threading.Tasks;
using ASPNETCoreIdentitySample.Services.Contracts.Identity;
using MailKit.Net.Smtp;
using MailKit.Security;
using MimeKit;
 
namespace ASPNETCoreIdentitySample.Services.Identity
{
    public class AuthMessageSender : IEmailSender, ISmsSender
    {
        public async Task SendEmailAsync(string email, string subject, string message)
        {
            var emailMessage = new MimeMessage();
 
            emailMessage.From.Add(new MailboxAddress("DNT", "do-not-reply@dotnettips.info"));
            emailMessage.To.Add(new MailboxAddress("", email));
            emailMessage.Subject = subject;
            emailMessage.Body = new TextPart(TextFormat.Html)
            {
                Text = message
            };
 
            using (var client = new SmtpClient())
            {
                client.LocalDomain = "dotnettips.info";
                await client.ConnectAsync("smtp.relay.uri", 25, SecureSocketOptions.None).ConfigureAwait(false);
                await client.SendAsync(emailMessage).ConfigureAwait(false);
                await client.DisconnectAsync(true).ConfigureAwait(false);
            }
        }
 
        public Task SendSmsAsync(string number, string message)
        {
            // Plug in your SMS service here to send a text message.
            return Task.FromResult(0);
        }
    }
}

using (var stream = new FileStream($@"c:\smtppickup\email-{Guid.NewGuid().ToString("N")}.eml", FileMode.CreateNew))
{
   emailMessage.WriteTo(stream);
}

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Logging" Version="2.2.0" />
  </ItemGroup>

</Project>

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.2</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.2.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\CoreIocServices\CoreIocServices.csproj" />
  </ItemGroup>

</Project>

using CoreIocServices;
using Microsoft.Extensions.DependencyInjection;

namespace CoreIocSample01
{
    class Program
    {
        static void Main(string[] args)
        {
            var serviceCollection = new ServiceCollection();
            ConfigureServices(serviceCollection);
            var serviceProvider = serviceCollection.BuildServiceProvider();

            var testService = serviceProvider.GetService<ITestService>();
            testService.Run();
        }

        private static void ConfigureServices(IServiceCollection services)
        {
            services.AddTransient<ITestService, TestService>();
        }
    }
}

Exception has occurred: CLR/System.InvalidOperationException
An unhandled exception of type 'System.InvalidOperationException' occurred in Microsoft.Extensions.DependencyInjection.dll:
'Unable to resolve service for type 'Microsoft.Extensions.Logging.ILogger`1[CoreIocServices.TestService]'
while attempting to activate 'CoreIocServices.TestService'.'

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.2</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.2.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="2.2.0" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="2.2.0" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\CoreIocServices\CoreIocServices.csproj" />
  </ItemGroup>

</Project>

private static void ConfigureServices(IServiceCollection services)
{
   services.AddLogging(configure => configure.AddConsole().AddDebug());
   services.AddTransient<ITestService, TestService>();
}

 CoreIocServices.TestService:Warning: A Warning from the TestService!

 C:\>dotnet --version
1.0.0-preview2-1-003177

{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-preview2-1-003177"
  }
}

 Can not find runtime target for framework '.NETCoreApp,Version=v1.0' compatible with one of the target runtimes: 'win10-x64, win81-x64, win8-x64, win7-x64'.
The project does not list one of 'win10-x64, win81-x64, win8-x64, win7-x64' in the 'runtimes' section.

"frameworks": {
    "netcoreapp1.1": {
        "dependencies": {
            "Microsoft.NETCore.App": {
                "type": "platform",
                "version": "1.1.0"
            }
        },
        "imports": [
            "dnxcore50",
            "portable-net45+win8"
        ]
    }
},

 PM> Update-Package

{
    "dependencies": {
        "Microsoft.AspNetCore.Diagnostics": "1.1.0",
        "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.1.0",
        "Microsoft.AspNetCore.Http.Extensions": "1.1.0",
        "Microsoft.AspNetCore.Mvc": "1.1.0",
        "Microsoft.AspNetCore.Mvc.Core": "1.1.0",
        "Microsoft.AspNetCore.Mvc.TagHelpers": "1.1.0",
        "Microsoft.AspNetCore.Razor.Runtime": "1.1.0",
        "Microsoft.AspNetCore.Razor.Tools": {
            "version": "1.1.0-preview4-final",
            "type": "build"
        },
        "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0",
        "Microsoft.AspNetCore.Server.Kestrel": "1.1.0",
        "Microsoft.AspNetCore.Session": "1.1.0",
        "Microsoft.AspNetCore.SpaServices": "1.0.0-beta-000019",
        "Microsoft.AspNetCore.StaticFiles": "1.1.0",
        "Microsoft.EntityFrameworkCore": "1.1.0",
        "Microsoft.EntityFrameworkCore.InMemory": "1.1.0",
        "Microsoft.EntityFrameworkCore.Tools.DotNet": {
            "version": "1.1.0-preview4-final",
            "type": "build"
        },
        "Microsoft.Extensions.Configuration.Binder": "1.1.0",
        "Microsoft.Extensions.Configuration.Json": "1.1.0",
        "Microsoft.Extensions.Logging.Console": "1.1.0",
        "Microsoft.Extensions.Logging.Debug": "1.1.0",
        "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
            "version": "1.1.0-preview4-final",
            "type": "build"
        },
        "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
            "version": "1.1.0-preview4-final",
            "type": "build"
        }
    },
 
    "tools": {
        "BundlerMinifier.Core": "2.2.301",
        "Microsoft.AspNetCore.Razor.Tools": "1.1.0-preview4-final",
        "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
            "version": "1.1.0-preview4-final",
            "imports": [
                "portable-net45+win8"
            ]
        },
        "Microsoft.EntityFrameworkCore.Tools.DotNet": {
            "version": "1.1.0-preview4-final",
            "imports": [
                "portable-net45+win8"
            ]
        },
        "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final"
    },
 
    "frameworks": {
        "netcoreapp1.1": {
            "dependencies": {
                "Microsoft.NETCore.App": {
                    "type": "platform",
                    "version": "1.1.0"
                }
            },
            "imports": [
                "dnxcore50",
                "portable-net45+win8"
            ]
        }
    },
 
    "buildOptions": {
        "emitEntryPoint": true,
        "preserveCompilationContext": true
    },
 
    "runtimeOptions": {
        "configProperties": {
            "System.GC.Server": true
        }
    },
 
    "publishOptions": {
        "include": [
            "wwwroot",
            "Features",
            "appsettings.json",
            "web.config"
        ]
    },
 
    "configurations": {
        "Release": {
            "buildOptions": {
                "optimize": true,
                "platform": "anycpu"
            }
        }
    },
 
    "scripts": {
        "precompile": [
            "dotnet bundle"
        ],
        "prepublish": [
            //"bower install"
        ],
        "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
    }
}

{
    "version": "1.0.0-*",
 
    "testRunner": "mstest",
    "dependencies": {
        "Microsoft.EntityFrameworkCore": "1.1.0",
        "Microsoft.EntityFrameworkCore.InMemory": "1.1.0",
        "NETStandard.Library": "1.6.1",
        "dotnet-test-mstest": "1.1.2-preview",
        "MSTest.TestFramework": "1.0.6-preview"
    },
 
    "frameworks": {
        "netcoreapp1.1": {
            "dependencies": {
                "Microsoft.NETCore.App": {
                    "type": "platform",
                    "version": "1.1.0"
                }
            },
            "imports": [
                "dnxcore50",
                "portable-net45+win8"
            ]
        }
    }
}

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