diff --git a/LawFirm/AbstractLawFirmFileImpliment/AbstractLawFirmFileImplement.csproj b/LawFirm/AbstractLawFirmFileImpliment/AbstractLawFirmFileImplement.csproj
new file mode 100644
index 0000000..f54052f
--- /dev/null
+++ b/LawFirm/AbstractLawFirmFileImpliment/AbstractLawFirmFileImplement.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AbstractLawFirmContracts\AbstractLawFirmContracts\AbstractLawFirmContracts.csproj" />
+    <ProjectReference Include="..\AbstractLawFirmDataModels\AbstractLawFirmDataModels\AbstractLawFirmDataModels.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/LawFirm/AbstractLawFirmFileImpliment/DataFileSingleton.cs b/LawFirm/AbstractLawFirmFileImpliment/DataFileSingleton.cs
new file mode 100644
index 0000000..20958a4
--- /dev/null
+++ b/LawFirm/AbstractLawFirmFileImpliment/DataFileSingleton.cs
@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+using AbstractLawFirmFileImplement.Models;
+
+namespace AbstractLawFirmFileImpliment
+{
+    internal class DataFileSingleton
+    {
+        private static DataFileSingleton? instance;
+        private readonly string ComponentFileName = "Component.xml";
+        private readonly string OrderFileName = "Order.xml";
+        private readonly string ProductFileName = "Product.xml";
+        public List<Component> Components { get; private set; }
+        public List<Order> Orders { get; private set; }
+        public List<Document> Documents { get; private set; }
+        public static DataFileSingleton GetInstance()
+        {
+            if (instance == null)
+            {
+                instance = new DataFileSingleton();
+            }
+            return instance;
+        }
+        public void SaveComponents() => SaveData(Components, ComponentFileName,
+       "Components", x => x.GetXElement);
+        public void SaveProducts() => SaveData(Products, ProductFileName,
+       "Products", x => x.GetXElement);
+        public void SaveOrders() { }
+        private DataFileSingleton()
+        {
+            Components = LoadData(ComponentFileName, "Component", x =>
+           Component.Create(x)!)!;
+            Documents = LoadData(ProductFileName, "Product", x =>
+           Document.Create(x)!)!;
+            Orders = new List<Order>();
+        }
+        private static List<T>? LoadData<T>(string filename, string xmlNodeName,
+       Func<XElement, T> selectFunction)
+        {
+            if (File.Exists(filename))
+            {
+                return
+               XDocument.Load(filename)?.Root?.Elements(xmlNodeName)?.Select(selectFunction)?.ToList();
+            }
+            return new List<T>();
+        }
+        private static void SaveData<T>(List<T> data, string filename, string
+       xmlNodeName, Func<T, XElement> selectFunction)
+        {
+            if (data != null)
+            {
+                new XDocument(new XElement(xmlNodeName,
+               data.Select(selectFunction).ToArray())).Save(filename);
+            }
+        }
+
+    }
+}
diff --git a/LawFirm/AbstractLawFirmFileImpliment/Implements/ComponentStorage.cs b/LawFirm/AbstractLawFirmFileImpliment/Implements/ComponentStorage.cs
new file mode 100644
index 0000000..c07e161
--- /dev/null
+++ b/LawFirm/AbstractLawFirmFileImpliment/Implements/ComponentStorage.cs
@@ -0,0 +1,90 @@
+using AbstractLawFirmContracts.BindingModels.BindingModels;
+using AbstractLawFirmContracts.SearchModels;
+using AbstractLawFirmContracts.ViewModels;
+using AbstractLawFirmFileImplement.Models;
+using AbstractLawFirmFileImpliment;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AbstractLawFirmFileImplement.Implements
+{
+    public class ComponentStorage
+    {
+        private readonly DataFileSingleton source;
+        public ComponentStorage()
+        {
+            source = DataFileSingleton.GetInstance();
+        }
+        public List<ComponentViewModel> GetFullList()
+        {
+            return source.Components
+            .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public List<ComponentViewModel> GetFilteredList(ComponentSearchModel
+       model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName))
+            {
+                return new();
+            }
+            return source.Components
+            .Where(x => x.ComponentName.Contains(model.ComponentName))
+           .Select(x => x.GetViewModel)
+           .ToList();
+        }
+        public ComponentViewModel? GetElement(ComponentSearchModel model)
+        {
+            if (string.IsNullOrEmpty(model.ComponentName) && !model.Id.HasValue)
+            {
+                return null;
+            }
+            return source.Components
+            .FirstOrDefault(x =>
+           (!string.IsNullOrEmpty(model.ComponentName) && x.ComponentName ==
+           model.ComponentName) ||
+            (model.Id.HasValue && x.Id == model.Id))
+            ?.GetViewModel;
+        }
+        public ComponentViewModel? Insert(ComponentBindingModel model)
+        {
+            model.Id = source.Components.Count > 0 ? source.Components.Max(x =>
+           x.Id) + 1 : 1;
+            var newComponent = Component.Create(model);
+            if (newComponent == null)
+            {
+                return null;
+            }
+            source.Components.Add(newComponent);
+            source.SaveComponents();
+            return newComponent.GetViewModel;
+        }
+        public ComponentViewModel? Update(ComponentBindingModel model)
+        {
+            var component = source.Components.FirstOrDefault(x => x.Id ==
+           model.Id);
+            if (component == null)
+            {
+                return null;
+            }
+            component.Update(model);
+            source.SaveComponents();
+            return component.GetViewModel;
+        }
+        public ComponentViewModel? Delete(ComponentBindingModel model)
+        {
+            var element = source.Components.FirstOrDefault(x => x.Id ==
+           model.Id);
+            if (element != null)
+            {
+                source.Components.Remove(element);
+                source.SaveComponents();
+                return element.GetViewModel;
+            }
+            return null;
+        }
+    }
+}
diff --git a/LawFirm/AbstractLawFirmFileImpliment/Models/Component.cs b/LawFirm/AbstractLawFirmFileImpliment/Models/Component.cs
new file mode 100644
index 0000000..2ff458b
--- /dev/null
+++ b/LawFirm/AbstractLawFirmFileImpliment/Models/Component.cs
@@ -0,0 +1,64 @@
+using AbstractLawFirmContracts.BindingModels.BindingModels;
+using AbstractLawFirmContracts.ViewModels;
+using AbstractLawFirmDataModels.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace AbstractLawFirmFileImplement.Models
+{
+    public class Component : IComponentModel
+    {
+        public int Id { get; private set; }
+        public string ComponentName { get; private set; } = string.Empty;
+        public double Cost { get; set; }
+        public static Component? Create(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = model.Id,
+                ComponentName = model.ComponentName,
+                Cost = model.Cost
+            };
+        }
+        public static Component? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Component()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                ComponentName = element.Element("ComponentName")!.Value,
+                Cost = Convert.ToDouble(element.Element("Cost")!.Value)
+            };
+        }
+        public void Update(ComponentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            ComponentName = model.ComponentName;
+            Cost = model.Cost;
+        }
+        public ComponentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            ComponentName = ComponentName,
+            Cost = Cost
+        };
+        public XElement GetXElement => new("Component",
+        new XAttribute("Id", Id),
+        new XElement("ComponentName", ComponentName),
+        new XElement("Cost", Cost.ToString()));
+    }
+}
diff --git a/LawFirm/AbstractLawFirmFileImpliment/Models/Document.cs b/LawFirm/AbstractLawFirmFileImpliment/Models/Document.cs
new file mode 100644
index 0000000..4f52077
--- /dev/null
+++ b/LawFirm/AbstractLawFirmFileImpliment/Models/Document.cs
@@ -0,0 +1,103 @@
+using AbstractLawFirmContracts.BindingModels;
+using AbstractLawFirmContracts.ViewModels;
+using AbstractLawFirmDataModels.Models;
+using AbstractLawFirmFileImpliment;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace AbstractLawFirmFileImplement.Models
+{
+    public class Document : IDocumentModel
+    {
+        public int Id { get; private set; }
+        public string DocumentName { get; private set; } = string.Empty;
+        public double Price { get; private set; }
+        public Dictionary<int, int> Components { get; private set; } = new();
+        private Dictionary<int, (IComponentModel, int)>? _productComponents =
+       null;
+        public Dictionary<int, (IComponentModel, int)> ProductComponents
+        {
+            get
+            {
+                if (_productComponents == null)
+                {
+                    var source = DataFileSingleton.GetInstance();
+                    _productComponents = Components.ToDictionary(x => x.Key, y =>
+                    ((source.Components.FirstOrDefault(z => z.Id == y.Key) as IComponentModel)!,
+                    y.Value));
+                }
+                return _productComponents;
+            }
+        }
+        public static Document? Create(DocumentBindingModel model)
+        {
+            if (model == null)
+            {
+                return null;
+            }
+            return new Document()
+            {
+                Id = model.Id,
+                DocumentName = model.DocumentName,
+                Price = model.Price,
+                Components = model.DocumentComponents.ToDictionary(x => x.Key, x
+               => x.Value.Item2)
+            };
+        }
+        public static Document? Create(XElement element)
+        {
+            if (element == null)
+            {
+                return null;
+            }
+            return new Document()
+            {
+                Id = Convert.ToInt32(element.Attribute("Id")!.Value),
+                DocumentName = element.Element("ProductName")!.Value,
+                Price = Convert.ToDouble(element.Element("Price")!.Value),
+                Components =
+           element.Element("ProductComponents")!.Elements("ProductComponent")
+            .ToDictionary(x =>
+           Convert.ToInt32(x.Element("Key")?.Value), x =>
+           Convert.ToInt32(x.Element("Value")?.Value))
+            };
+        }
+        public void Update(DocumentBindingModel model)
+        {
+            if (model == null)
+            {
+                return;
+            }
+            DocumentName = model.DocumentName;
+            Price = model.Price;
+            Components = model.DocumentComponents.ToDictionary(x => x.Key, x =>
+           x.Value.Item2);
+            _productComponents = null;
+        }
+        public DocumentViewModel GetViewModel => new()
+        {
+            Id = Id,
+            DocumentName = DocumentName,
+            Price = Price,
+            DocumentComponents = ProductComponents
+        };
+        public XElement GetXElement => new("Product",
+        new XAttribute("Id", Id),
+        new XElement("ProductName", DocumentName),
+        new XElement("Price", Price.ToString()),
+        new XElement("ProductComponents", Components.Select(x =>
+       new XElement("ProductComponent",
+
+       new XElement("Key", x.Key),
+
+       new XElement("Value", x.Value)))
+
+       .ToArray()));
+
+        public Dictionary<int, (IComponentModel, int)> DocumentComponents => throw new NotImplementedException();
+    }
+}
diff --git a/LawFirm/LawFirm.sln b/LawFirm/LawFirm.sln
index 09da4ff..e41b11c 100644
--- a/LawFirm/LawFirm.sln
+++ b/LawFirm/LawFirm.sln
@@ -9,9 +9,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractLawFirmDataModels",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractLawFirmContracts", "AbstractLawFirmContracts\AbstractLawFirmContracts\AbstractLawFirmContracts.csproj", "{C0155B2E-5974-4835-996B-6FDF0F5BC06B}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AbstractLawFirmBusinessLogic", "AbstractLawFirmBusinessLogic\AbstractLawFirmBusinessLogic.csproj", "{E48808B1-5381-4774-97B6-CDB107DCF98C}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractLawFirmBusinessLogic", "AbstractLawFirmBusinessLogic\AbstractLawFirmBusinessLogic.csproj", "{E48808B1-5381-4774-97B6-CDB107DCF98C}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AbstractLawFirmListImplement", "AbstractLawFirmListImplement\AbstractLawFirmListImplement.csproj", "{86D5FC6F-B262-44A0-9D30-970F9EA93E0A}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AbstractLawFirmListImplement", "AbstractLawFirmListImplement\AbstractLawFirmListImplement.csproj", "{86D5FC6F-B262-44A0-9D30-970F9EA93E0A}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AbstractLawFirmFileImplement", "AbstractLawFirmFileImpliment\AbstractLawFirmFileImplement.csproj", "{8AF960C2-208F-4B7B-9F8B-36B63446B6B7}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -39,6 +41,10 @@ Global
 		{86D5FC6F-B262-44A0-9D30-970F9EA93E0A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{86D5FC6F-B262-44A0-9D30-970F9EA93E0A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{86D5FC6F-B262-44A0-9D30-970F9EA93E0A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8AF960C2-208F-4B7B-9F8B-36B63446B6B7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8AF960C2-208F-4B7B-9F8B-36B63446B6B7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8AF960C2-208F-4B7B-9F8B-36B63446B6B7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8AF960C2-208F-4B7B-9F8B-36B63446B6B7}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/LawFirm/LawFirmView/LawFirmView.csproj b/LawFirm/LawFirmView/LawFirmView.csproj
index b6cfc13..c62edf7 100644
--- a/LawFirm/LawFirmView/LawFirmView.csproj
+++ b/LawFirm/LawFirmView/LawFirmView.csproj
@@ -15,6 +15,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\AbstractLawFirmBusinessLogic\AbstractLawFirmBusinessLogic.csproj" />
+    <ProjectReference Include="..\AbstractLawFirmFileImpliment\AbstractLawFirmFileImplement.csproj" />
     <ProjectReference Include="..\AbstractLawFirmListImplement\AbstractLawFirmListImplement.csproj" />
   </ItemGroup>