сделала реализацию класса-хранилища для рецепта

Polyclinic/PolyclinicContracts/SearchModels/RecipeSearchModel.cs

@@ -3,6 +3,6 @@
     public class RecipeSearchModel
     {
         public int? Id { get; set; } 
-        public string? Name { get; set; } 
+        public string? Comment { get; set; } 
     }
 }

Polyclinic/PolyclinicDatabaseImplement/Implements/RecipeStorage.cs

@@ -1,4 +1,10 @@
-using PolyclinicContracts.StoragesContracts;
+using Microsoft.EntityFrameworkCore;
+using PolyclinicContracts.BindingModels;
+using PolyclinicContracts.SearchModels;
+using PolyclinicContracts.StoragesContracts;
+using PolyclinicContracts.ViewModels;
+using PolyclinicDatabaseImplement.Models;
+using SecuritySystemDatabaseImplement;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -9,5 +15,69 @@ namespace PolyclinicDatabaseImplement.Implements
 {
     public class RecipeStorage : IRecipeStorage
     {
+        public List<RecipeViewModel> GetFullList()
+        {
+            using var database = new PolyclinicDatabase();
+            return database.Recipes.Select(x => x.GetViewModel).ToList();
+        }
+        public List<RecipeViewModel> GetFilteredList(RecipeSearchModel bindingModel)
+        {
+            if (!bindingModel.Id.HasValue || string.IsNullOrEmpty(bindingModel.Comment))
+            {
+                return new();
+            }
+            using var database = new PolyclinicDatabase();
+            return database.Recipes.Where(x => x.Comment.Contains(bindingModel.Comment)).Select(x => x.GetViewModel).ToList();
+        }
+
+        public RecipeViewModel? GetElement(RecipeSearchModel bindingModel)
+        {
+            if (!bindingModel.Id.HasValue || string.IsNullOrEmpty(bindingModel.Comment))
+            {
+                return null;
+            }
+            using var database = new PolyclinicDatabase();
+            return database.Recipes.FirstOrDefault(x => (!string.IsNullOrEmpty(bindingModel.Comment) &&
+            x.Comment == bindingModel.Comment) || (bindingModel.Id.HasValue && x.Id == bindingModel.Id))?.GetViewModel;
+        }
+
+        public RecipeViewModel Insert(RecipeBindingModel bindingModel)
+        {
+            using var database = new PolyclinicDatabase();
+            var newRecipe = Recipe.Create(bindingModel);
+            if(newRecipe == null)
+            {
+                return null;
+            }
+            database.Recipes.Add(newRecipe);
+            database.SaveChanges();
+            return newRecipe.GetViewModel;
+        }
+
+        public RecipeViewModel? Update(RecipeBindingModel bindingModel)
+        {
+            using var database = new PolyclinicDatabase();
+            var recipe = database.Recipes.FirstOrDefault(x => x.Id == bindingModel.Id);
+            if(recipe == null)
+            {
+                return null;
+            }
+            recipe.Update(bindingModel);
+            database.SaveChanges();
+            return recipe.GetViewModel;
+        }
+
+        public RecipeViewModel? Delete(RecipeBindingModel bindingModel)
+        {
+            using var database = new PolyclinicDatabase();
+            var recipe = database.Recipes.FirstOrDefault(x => x.Id == bindingModel.Id);
+            if (recipe == null)
+            {
+                return null;
+            }
+            database.Recipes.Remove(recipe);
+            database.SaveChanges();
+            return recipe.GetViewModel;
+        }
     }
 }

Polyclinic/PolyclinicDatabaseImplement/Models/Recipe.cs

@@ -16,7 +16,7 @@ namespace PolyclinicDatabaseImplement.Models
         [Required]
         public string Comment { get; set; } = string.Empty;
 
-        public static Recipe Create(PolyclinicDatabase database, RecipeBindingModel bindingModel)
+        public static Recipe Create( RecipeBindingModel bindingModel)
         {
             return new Recipe()
             {