using System;

using Microsoft.Extensions.DependencyInjection;

​

var container = new ServiceCollection();

container.AddTransient<ICommandBuilder, CommandBuilder>();

container.AddTransient<ICommand<Context1>, Context1Command>();

var provider = container.BuildServiceProvider();

var commandBuilder = provider.GetRequiredService<ICommandBuilder>();

Console.WriteLine(commandBuilder.Execute(new Context1()));

​

interface ICommand<TContext>

{

    object Execute(TContext context);

}

​

interface ICommandBuilder

{

    object Execute<TContext>(TContext context);

}

​

class CommandBuilder : ICommandBuilder

{

    private readonly IServiceProvider _serviceProvider;

​

    public CommandBuilder(IServiceProvider serviceProvider)

    {

        _serviceProvider = serviceProvider;

    }

​

    public object Execute<TContext>(TContext context)

    {

        var command = _serviceProvider.GetRequiredService<ICommand<TContext>>();

        return command.Execute(context);

    }

}

​

class Context1

{

    public string Value => "test";

}

​

class Context1Command : ICommand<Context1>

{

    public object Execute(Context1 context) => context.Value;

}