Program.cs

varbuilder=WebApplication.CreateBuilder();

//Register all objects configured by classes that implements IBootstrap.
//This is useful when you have large amount of classes in your project that needs
//registration. You can register them near where they are (usually in the same folder) instead of
//registering them somewhere in a giant registration function
vartype=typeof(IBootstrap);
vartypes=System.AppDomain.CurrentDomain.GetAssemblies()
.SelectMany(x =>x.GetTypes())
.Where(p =>type.IsAssignableFrom(p)&&p.IsClass);

foreach(varpintypes)
{
varconfig=(IBootstrap)System.Activator.CreateInstance(p);
config.Register(builder.Services);
}

varapp=builder.Build();

app.Run(context =>
{
varperson=context.RequestServices.GetService<Person>();
vargreeting=context.RequestServices.GetService<Greeting>();

returncontext.Response.WriteAsync($"{greeting.Message}{person.Name}");
});

app.Run();

publicinterfaceIBootstrap
{
voidRegister(IServiceCollectionservices);
}

publicclassRegistration1:IBootstrap
{
publicvoidRegister(IServiceCollectionservices)
{
services.AddTransient(x =>newPerson{Name="Mahmoud"});
//continue registering all your classes here
}
}

//This is a contrite sample but it demonstrates that you can have these two registration classes in farflung folders near the classes
//they are registrating.
publicclassRegistration2:IBootstrap
{
publicvoidRegister(IServiceCollectionservices)
{
services.AddTransient(x =>newGreeting{Message="Good Morning"});
//continue registering all your classes here
}
}

publicclassPerson
{
publicstringName{get;set;}
}

publicclassGreeting
{
publicstringMessage{get;set;}
}