Mico.Demo/Microservice.Common/ServiceClientExtensions.cs

using Microsoft.Extensions.DependencyInjection;

namespace Microservice.Common
{
    public static class ServiceClientExtensions
    {
        public static IServiceCollection AddServiceClient(this IServiceCollection services)
        {
            services.AddTransient<IServiceClient, ServiceClient>();

            return services;
        }
    }
}