git clone https://github.com/microsoft/documentdb.git

docker build . -f .devcontainer/Dockerfile -t documentdb  
docker run -v $(pwd):/home/documentdb/code -it documentdb /bin/bash
cd code && make && sudo make install
./scripts/start_oss_server.sh -t documentdb

psql -p 9712 -h localhost -d postgres

Result<User> result = userService.FindById(id);
if (!result.IsSuccess)
    return Error(result.Error);

class User
{
    public string Name { get; set; }
    public int Age { get; set; }
}

var users = new List<User>
{
    new User { Name = "Alice", Age = 30 },
    new User { Name = "Bob", Age = 25 },
    new User { Name = "Alice", Age = 35 },
    new User { Name = "Eve", Age = 25 }
};

foreach (var user in UniqueBy(users, u => u.Name))
{
    Console.WriteLine($"{user.Name}, {user.Age}");
}
// Вывод:
// Alice, 30
// Bob, 25
// Eve, 25

public static IEnumerable<T> UniqueBy<T, TKey>(IEnumerable<T> source, Func<T, TKey> keySelector)
{
    var seen = new HashSet<TKey>();
    foreach (var item in source)
    {
        var key = keySelector(item);
        if (seen.Add(key))
            yield return item;
    }
}

services.Decorate<IService, LoggingDecorator>();