MediatR -> Mediator

public interface ICommand;
 
public interface ICommand<TResponse>;
 
public interface ICommandHandler<in TCommand>
    where TCommand : ICommand
{
    Task<Result> Handle(TCommand command, CancellationToken cancellationToken);
}
 
public interface ICommandHandler<in TCommand, TResponse>
    where TCommand : ICommand<TResponse>
{
    Task<Result<TResponse>> Handle(TCommand command, CancellationToken cancellationToken);
}
 
public interface IQuery<TResponse>;
public interface IQueryHandler<in TQuery, TResponse>
    where TQuery : IQuery<TResponse>
{
    Task<Result<TResponse>> Handle(TQuery query, CancellationToken cancellationToken);
}
public static class DependencyInjection
{
    public static IServiceCollection AddCustomMediator(this IServiceCollection services)
    {
        services.Scan(scan => scan.FromAssembliesOf(typeof(DependencyInjection))
            .AddClasses(classes => classes.AssignableTo(typeof(IQueryHandler<,>)), publicOnly: false)
                .AsImplementedInterfaces()
                .WithScopedLifetime()
            .AddClasses(classes => classes.AssignableTo(typeof(ICommandHandler<>)), publicOnly: false)
                .AsImplementedInterfaces()
                .WithScopedLifetime()
            .AddClasses(classes => classes.AssignableTo(typeof(ICommandHandler<,>)), publicOnly: false)
                .AsImplementedInterfaces()
                .WithScopedLifetime());
 
    }
}