Demo/UI/GroupConsole.cs

using Posechaemost.Domain.Models;
using Posechaemost.Domain.UseCase;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Posechaemost.UI
{
    public class GroupConsoleUI
    {
        GroupUseCase _groupUseCase;
        public GroupConsoleUI(GroupUseCase groupUseCase) {
            _groupUseCase = groupUseCase;
        }

        public void DisplayAllGroups()
        {
            StringBuilder groupOutput = new StringBuilder();
            foreach (var group in _groupUseCase.GetAllGroups())
            {
                groupOutput.AppendLine($"{group.Id}\t{group.Name}");
            }
            Console.WriteLine(groupOutput);
        }

        public void UpdateGroupName(String name, String name1) {
            StringBuilder userOutput = new StringBuilder();    
            var group = _groupUseCase.UpdateGroupName(name, name1);
            userOutput.AppendLine($"{group.Id}\t{group.Name}");
            Console.WriteLine(userOutput);
        }
    }
}