diff --git a/TheBank/BankContracts/BankContracts.csproj b/TheBank/BankContracts/BankContracts.csproj
new file mode 100644
index 0000000..125f4c9
--- /dev/null
+++ b/TheBank/BankContracts/BankContracts.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/TheBank/BankContracts/DataModels/CreditProgramCurrencyDataModel.cs b/TheBank/BankContracts/DataModels/CreditProgramCurrencyDataModel.cs
new file mode 100644
index 0000000..2b24480
--- /dev/null
+++ b/TheBank/BankContracts/DataModels/CreditProgramCurrencyDataModel.cs
@@ -0,0 +1,37 @@
+using BankContracts.Exceptions;
+using BankContracts.Extensions;
+using BankContracts.Infrastructure;
+
+namespace BankContracts.DataModels;
+
+/// <summary>
+/// Дата модель кредитная программа - валюта (многие ко многим)
+/// </summary>
+/// <param name="creditProgramId">уникальный Guid индентификатор кредитной программы</param>
+/// <param name="currencyId">уникальный Guid индентификатор валюты</param>
+public class CreditProgramCurrencyDataModel(string creditProgramId, string currencyId) : IValidation
+{
+    public string CreditProgramId { get; private set; } = creditProgramId;
+
+    public string CurrencyId { get; private set; } = currencyId;
+
+    public void Validate()
+    {
+        if (CreditProgramId.IsEmpty())
+        {
+            throw new ValidationException("Field CreditProgramId is null or empty");
+        }
+        if (!CreditProgramId.IsGuid())
+        {
+            throw new ValidationException("The value in the field CreditProgramId is not a unique identifier");
+        }
+        if (CurrencyId.IsEmpty())
+        {
+            throw new ValidationException("Field CurrencyId is null or empty");
+        }
+        if (!CurrencyId.IsGuid())
+        {
+            throw new ValidationException("The value in the field CurrencyId is not a unique identifier");
+        }
+    }
+}
diff --git a/TheBank/BankContracts/DataModels/CreditProgramDataModel.cs b/TheBank/BankContracts/DataModels/CreditProgramDataModel.cs
new file mode 100644
index 0000000..e7ee5af
--- /dev/null
+++ b/TheBank/BankContracts/DataModels/CreditProgramDataModel.cs
@@ -0,0 +1,69 @@
+using BankContracts.Exceptions;
+using BankContracts.Extensions;
+using BankContracts.Infrastructure;
+
+namespace BankContracts.DataModels;
+
+/// <summary>
+/// Дата модель кредитной программы
+/// </summary>
+/// <param name="id">уникальный Guid индентификатор</param>
+/// <param name="name">название</param>
+/// <param name="cost">сумма</param>
+/// <param name="maxCost">максимальная сумма</param>
+/// <param name="storekeeperId">уникальный Guid Индентификатор кладовщика</param>
+/// <param name="periodId">уникальный Guid Индентификатор срока</param>
+public class CreditProgramDataModel(string id, string name, decimal cost, decimal maxCost, string storekeeperId, string periodId) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string Name { get; private set; } = name;
+
+    public decimal Cost { get; private set; } = cost;
+    
+    public decimal MaxCost { get; private set; } = maxCost;
+
+    public string StorekeeperId { get; private set; } = storekeeperId;
+
+    public string PeriodId { get; private set; } = periodId;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+        {
+            throw new ValidationException("Field Id is null or empty");
+        }
+        if (!Id.IsGuid())
+        {
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        }
+        if (Name.IsEmpty())
+        {
+            throw new ValidationException("Field Name is null or empty");
+        }
+        if (Cost <= 0)
+        {
+            throw new ValidationException("Field Cost is less or equal to zero");
+        }
+        if (MaxCost <= 0)
+        {
+            throw new ValidationException("Field MaxCost is less or equal to zero");
+        }
+        if (StorekeeperId.IsEmpty())
+        {
+            throw new ValidationException("Field StorekeeperId is null or empty");
+        }
+        if (!StorekeeperId.IsGuid())
+        {
+            throw new ValidationException("The value in the field StorekeeperId is not a unique identifier");
+        }
+        if (PeriodId.IsEmpty())
+        {
+            throw new ValidationException("Field PeriodId is null or empty");
+        }
+        if (!PeriodId.IsGuid())
+        {
+            throw new ValidationException("The value in the field PeriodId is not a unique identifier");
+        }
+    }
+}
diff --git a/TheBank/BankContracts/DataModels/CurrencyDataModel.cs b/TheBank/BankContracts/DataModels/CurrencyDataModel.cs
new file mode 100644
index 0000000..3a2bd50
--- /dev/null
+++ b/TheBank/BankContracts/DataModels/CurrencyDataModel.cs
@@ -0,0 +1,58 @@
+using BankContracts.Exceptions;
+using BankContracts.Extensions;
+using BankContracts.Infrastructure;
+
+namespace BankContracts.DataModels;
+
+/// <summary>
+/// Дата модель валюты
+/// </summary>
+/// <param name="id">уникальный Guid индентификатор</param>
+/// <param name="name">название</param>
+/// <param name="abbreviation">аббревиатура</param>
+/// <param name="cost">стоимость валюты</param>
+/// <param name="storekeeperId">уникальный Guid Индентификатор кладовщика</param>
+public class CurrencyDataModel(string id, string name, string abbreviation, decimal cost, string storekeeperId) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string Name { get; private set; } = name;
+
+    public string Abbreviation { get; private set; } = abbreviation;
+
+    public decimal Cost { get; private set; } = cost;
+
+    public string StorekeeperId { get; private set; } = storekeeperId;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+        {
+            throw new ValidationException("Field Id is null or empty");
+        }
+        if (!Id.IsGuid())
+        {
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        }
+        if (Name.IsEmpty())
+        {
+            throw new ValidationException("Field Name is null or empty");
+        }
+        if (Abbreviation.IsEmpty())
+        {
+            throw new ValidationException("Field Abbreviation is null or empty");
+        }
+        if (Cost <= 0)
+        {
+            throw new ValidationException("Field Cost is less or equal to zero");
+        }
+        if (StorekeeperId.IsEmpty())
+        {
+            throw new ValidationException("Field StorekeeperId is null or empty");
+        }
+        if (!StorekeeperId.IsGuid())
+        {
+            throw new ValidationException("The value in the field StorekeeperId is not a unique identifier");
+        }
+    }
+}
diff --git a/TheBank/BankContracts/DataModels/PeriodDataModel.cs b/TheBank/BankContracts/DataModels/PeriodDataModel.cs
new file mode 100644
index 0000000..cfe9f76
--- /dev/null
+++ b/TheBank/BankContracts/DataModels/PeriodDataModel.cs
@@ -0,0 +1,47 @@
+using BankContracts.Exceptions;
+using BankContracts.Extensions;
+using BankContracts.Infrastructure;
+
+namespace BankContracts.DataModels;
+
+/// <summary>
+/// Дата модель срока
+/// </summary>
+/// <param name="id">уникальный Guid индентификатор</param>
+/// <param name="startDate"></param>
+/// <param name="endDate"></param>
+/// <param name="storekeeperId">уникальный Guid индентификатор кладовщика</param>
+public class PeriodDataModel(string id, DateTime startDate, DateTime endDate, string storekeeperId) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public DateTime StartTime { get; private set; } = startDate;
+
+    public DateTime EndTime { get; private set; } = endDate;
+
+    public string StorekeeperId { get; private set; } = storekeeperId;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+        {
+            throw new ValidationException("Field Id is null or empty");
+        }
+        if (!Id.IsGuid())
+        {
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        }
+        if (StartTime.Date > EndTime.Date)
+        {
+            throw new ValidationException($"he date of period start cannot be larger than the date of period end");
+        }
+        if (StorekeeperId.IsEmpty())
+        {
+            throw new ValidationException("Field StorekeeperId is null or empty");
+        }
+        if (!StorekeeperId.IsGuid())
+        {
+            throw new ValidationException("The value in the field StorekeeperId is not a unique identifier");
+        }
+    }
+}
diff --git a/TheBank/BankContracts/DataModels/StorekeeperDataModel.cs b/TheBank/BankContracts/DataModels/StorekeeperDataModel.cs
new file mode 100644
index 0000000..b9a9037
--- /dev/null
+++ b/TheBank/BankContracts/DataModels/StorekeeperDataModel.cs
@@ -0,0 +1,86 @@
+using BankContracts.Exceptions;
+using BankContracts.Extensions;
+using BankContracts.Infrastructure;
+using System.Text.RegularExpressions;
+
+namespace BankContracts.DataModels;
+
+/// <summary>
+/// Дата модель кладовщика
+/// </summary>
+/// <param name="id">уникальный Guid индентификатор</param>
+/// <param name="name">имя</param>
+/// <param name="surname">фамилия</param>
+/// <param name="middleName">отчество (лучше не придумал)</param>
+/// <param name="login">логин</param>
+/// <param name="password">пароль</param>
+/// <param name="email">адрес электронной почты</param>
+/// <param name="phoneNumber">номер телефона</param>
+public class StorekeeperDataModel(
+    string id, string name, string surname, string middleName,
+    string login, string password, string email, string phoneNumber) : IValidation
+{
+    public string Id { get; private set; } = id;
+
+    public string Name { get; private set; } = name;
+
+    public string Surname { get; private set; } = surname;
+
+    public string MiddleName { get; private set; } = middleName;
+
+    public string Login {  get; private set; } = login;
+
+    public string Password { get; private set; } = password;
+
+    public string Email { get; private set; } = email;
+
+    public string PhoneNumber { get; private set; } = phoneNumber;
+
+    public void Validate()
+    {
+        if (Id.IsEmpty())
+        {
+            throw new ValidationException("Field Id is null or empty");
+        }
+        if (!Id.IsGuid())
+        {
+            throw new ValidationException("The value in the field Id is not a unique identifier");
+        }
+        if (Name.IsEmpty())
+        {
+            throw new ValidationException("Field Name is null or empty");
+        }
+        if (Surname.IsEmpty())
+        {
+            throw new ValidationException("Field Surname is null or empty");
+        }
+        if (MiddleName.IsEmpty())
+        {
+            throw new ValidationException("Field MiddleName is null or empty");
+        }
+        if (Login.IsEmpty())
+        {
+            throw new ValidationException("Field Login is null or empty");
+        }
+        if (Password.IsEmpty())
+        {
+            throw new ValidationException("Field Password is null or empty");
+        }
+        if (Email.IsEmpty())
+        {
+            throw new ValidationException("Field Email is null or empty");
+        }
+        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+        {
+            throw new ValidationException("Field Email is not a valid email address");
+        }
+        if (PhoneNumber.IsEmpty())
+        {
+            throw new ValidationException("Field PhoneNumber is null or empty");
+        }
+        if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
+        {
+            throw new ValidationException("Field PhoneNumber is not a phone number");
+        }
+    }
+}
diff --git a/TheBank/BankContracts/Exceptions/ValidationException.cs b/TheBank/BankContracts/Exceptions/ValidationException.cs
new file mode 100644
index 0000000..e167df6
--- /dev/null
+++ b/TheBank/BankContracts/Exceptions/ValidationException.cs
@@ -0,0 +1,6 @@
+namespace BankContracts.Exceptions;
+
+/// <summary>
+/// Класс-исключение при валидации данных в дата моделях
+/// </summary>
+public class ValidationException(string message) : Exception(message) { }
\ No newline at end of file
diff --git a/TheBank/BankContracts/Extensions/StringExtension.cs b/TheBank/BankContracts/Extensions/StringExtension.cs
new file mode 100644
index 0000000..42ad086
--- /dev/null
+++ b/TheBank/BankContracts/Extensions/StringExtension.cs
@@ -0,0 +1,14 @@
+namespace BankContracts.Extensions;
+
+public static class StringExtension
+{
+    public static bool IsEmpty(this string str)
+    {
+        return string.IsNullOrWhiteSpace(str);
+    }
+
+    public static bool IsGuid(this string str)
+    {
+        return Guid.TryParse(str, out _);
+    }
+}
diff --git a/TheBank/BankContracts/Infrastructure/IValidation.cs b/TheBank/BankContracts/Infrastructure/IValidation.cs
new file mode 100644
index 0000000..dfd36f2
--- /dev/null
+++ b/TheBank/BankContracts/Infrastructure/IValidation.cs
@@ -0,0 +1,9 @@
+namespace BankContracts.Infrastructure;
+
+/// <summary>
+/// Валидация данных в дата моделях
+/// </summary>
+internal interface IValidation
+{
+    void Validate();
+}
diff --git a/TheBank/TheBank.sln b/TheBank/TheBank.sln
new file mode 100644
index 0000000..afb9ea6
--- /dev/null
+++ b/TheBank/TheBank.sln
@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35707.178 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BankContracts", "BankContracts\BankContracts.csproj", "{7AF1B83C-2E92-482F-8189-6FE7313134FD}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7AF1B83C-2E92-482F-8189-6FE7313134FD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7AF1B83C-2E92-482F-8189-6FE7313134FD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7AF1B83C-2E92-482F-8189-6FE7313134FD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7AF1B83C-2E92-482F-8189-6FE7313134FD}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal