добавила реализацию listImplements для исполнителя

SushiBarListImplements/DataListSingleton.cs

@@ -9,12 +9,14 @@ namespace SushiBarListImplement
         public List<Order> Orders { get; set; }
         public List<Sushi> Sushis { get; set; }
         public List<Client> Clients { get; set; }
+        public List<Implementer> Implementers { get; set; }
         private DataListSingleton()
         {
             Components = new List<Component>();
             Orders = new List<Order>();
             Sushis = new List<Sushi>();
             Clients = new List<Client>();
+            Implementers = new List<Implementer>();
         }
         public static DataListSingleton GetInstance()
         {

SushiBarListImplements/Implements/ImplementerStorage.cs

@@ -0,0 +1,107 @@
+using SushiBarContracts.BindingModel;
+using SushiBarContracts.SearchModel;
+using SushiBarContracts.StoragesContracts;
+using SushiBarContracts.ViewModels;
+using SushiBarListImplement;
+using SushiBarListImplements.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SushiBarListImplements.Implements
+{
+    public class ImplementerStorage : IImplementerStorage
+    {
+        private readonly DataListSingleton _source;
+        public ImplementerStorage()
+        {
+            _source = DataListSingleton.GetInstance();
+        }
+        public List<ImplementerViewModel> GetFullList()
+        {
+            var result = new List<ImplementerViewModel>();
+            foreach (var implementer in _source.Implementers)
+            {
+                result.Add(implementer.GetViewModel);
+            }
+            return result;
+        }
+        public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
+        {
+            var result = new List<ImplementerViewModel>();
+            if (string.IsNullOrEmpty(model.ImplementerFIO))
+            {
+                return result;
+            }
+            foreach (var implementer in _source.Implementers)
+            {
+                if (implementer.ImplementerFIO.Contains(model.ImplementerFIO))
+                {
+                    result.Add(implementer.GetViewModel);
+                }
+            }
+            return result;
+        }
+        public ImplementerViewModel? GetElement(ImplementerSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ImplementerFIO) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            foreach (var implementer in _source.Implementers)
+            {
+                if (!string.IsNullOrEmpty(model.ImplementerFIO) && implementer.ImplementerFIO == model.ImplementerFIO ||
+                model.Id.HasValue && implementer.ImplementerFIO == model.ImplementerFIO)
+                {
+                    return implementer.GetViewModel;
+                }
+            }
+            return null;
+        }
+        public ImplementerViewModel? Insert(ImplementerBindingModel model)
+        {
+            model.Id = 1;
+            foreach (var implementer in _source.Implementers)
+            {
+                if (model.Id <= implementer.Id)
+                {
+                    model.Id = implementer.Id + 1;
+                }
+            }
+            var newImplementer = Implementer.Create(model);
+            if (newImplementer == null)
+            {
+                return null;
+            }
+            _source.Implementers.Add(newImplementer);
+            return newImplementer.GetViewModel;
+        }
+        public ImplementerViewModel? Update(ImplementerBindingModel model)
+        {
+            foreach (var implementer in _source.Implementers)
+            {
+                if (implementer.Id == model.Id)
+                {
+                    implementer.Update(model);
+                    return implementer.GetViewModel;
+                }
+            }
+            return null;
+        }
+        public ImplementerViewModel? Delete(ImplementerBindingModel model)
+        {
+            for (int i = 0; i < _source.Implementers.Count; ++i)
+            {
+                if (_source.Implementers[i].Id == model.Id)
+                {
+                    var element = _source.Implementers[i];
+                    _source.Implementers.RemoveAt(i);
+                    return element.GetViewModel;
+                }
+            }
+            return null;
+        }
+    }
+}

SushiBarListImplements/Models/Implementer.cs

@@ -0,0 +1,55 @@
+using SushiBarContracts.BindingModel;
+using SushiBarContracts.ViewModels;
+using SushiBarDataModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SushiBarListImplements.Models
+{
+    public class Implementer : IImplementerModel
+    {
+        public int Id { get; private set; }
+        public string ImplementerFIO { get; private set; } = string.Empty;
+        public string Password { get; set; } = string.Empty;
+        public int WorkExperience { get; set; }
+        public int Qualification { get; set; }
+
+        public static Implementer? Create(ImplementerBindingModel? model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Implementer()
+            {
+                Id = model.Id,
+                ImplementerFIO = model.ImplementerFIO,
+                WorkExperience = model.WorkExperience,
+                Qualification = model.Qualification,
+                Password = model.Password,
+            };
+        }
+        public void Update(ImplementerBindingModel? model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ImplementerFIO = model.ImplementerFIO;
+            Password = model.Password;
+            WorkExperience = model.WorkExperience;
+            Qualification = model.Qualification;
+        }
+        public ImplementerViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ImplementerFIO = ImplementerFIO,
+            WorkExperience = WorkExperience,
+            Password = Password,
+            Qualification = Qualification,
+        };
+    }
+}