using MediatR.BehaviorProfiles;

public class MyBehaviorProfile : BehaviorProfile
{
    public override void Configure()
    {
        Register(typeof(LoggingBehavior<,>));

        Register(typeof(TransactionBehavior<,>), handlers =>
        {
            handlers.Include<CreateOrderHandler>();
            handlers.Include<DeleteOrderHandler>();
        });
    }
}

using MediatR.BehaviorProfiles.Extensions;

public void ConfigureServices(IServiceCollection services)
{
    services
        .AddMediatR()
        .AddBehaviorProfile<MyBehaviorProfile>();     
}