diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/DisciplineLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/DisciplineLogic.cs
new file mode 100644
index 0000000..b913209
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/DisciplineLogic.cs
@@ -0,0 +1,111 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class DisciplineLogic : IDisciplineLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IDisciplineStorage _disciplineStorage;
+		public DisciplineLogic(ILogger<DisciplineLogic> logger, IDisciplineStorage disciplineStorage)
+		{
+			_logger = logger;
+			_disciplineStorage = disciplineStorage;
+		}
+		public bool Create(DisciplineBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_disciplineStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(DisciplineBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_disciplineStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		public DisciplineViewModel? ReadElement(DisciplineSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Title:{Title}.Id:{ Id}", model.Title, model.Id);
+			var element = _disciplineStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+
+		public List<DisciplineViewModel>? ReadList(DisciplineSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Title:{Title}.Id:{ Id}", model?.Title, model?.Id);
+			var list = model == null ? _disciplineStorage.GetFullList() : _disciplineStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+
+		public bool Update(DisciplineBindingModel model)
+		{
+			CheckModel(model);
+			if (_disciplineStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		private void CheckModel(DisciplineBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Title))
+			{
+				throw new ArgumentNullException("Нет названия дисциплины", nameof(model.Title));
+			}
+
+			_logger.LogInformation("Discipline. Title:{Title}.Id:{Id}", model.Title, model.Id);
+			var element = _disciplineStorage.GetElement(new DisciplineSearchModel
+			{
+				Title = model.Title
+			});
+			if (element != null && element.Id != model.Id)
+			{
+			    throw new InvalidOperationException("Дисциплина с таким названием уже есть");
+			}
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/GroupLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/GroupLogic.cs
new file mode 100644
index 0000000..2d4a49e
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/GroupLogic.cs
@@ -0,0 +1,111 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class GroupLogic : IGroupLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IGroupStorage _groupStorage;
+		public GroupLogic(ILogger<GroupLogic> logger, IGroupStorage groupStorage)
+		{
+			_logger = logger;
+			_groupStorage = groupStorage;
+		}
+		public bool Create(GroupBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_groupStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(GroupBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_groupStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		public GroupViewModel? ReadElement(GroupSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Title:{Title}.Id:{ Id}", model.Title, model.Id);
+			var element = _groupStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+
+		public List<GroupViewModel>? ReadList(GroupSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Title:{Title}.Id:{ Id}", model?.Title, model?.Id);
+			var list = model == null ? _groupStorage.GetFullList() : _groupStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+
+		public bool Update(GroupBindingModel model)
+		{
+			CheckModel(model);
+			if (_groupStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		private void CheckModel(GroupBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Title))
+			{
+				throw new ArgumentNullException("Нет названия группы", nameof(model.Title));
+			}
+
+			_logger.LogInformation("Group. Title:{Title}.Id:{Id}", model.Title, model.Id);
+			var element = _groupStorage.GetElement(new GroupSearchModel
+			{
+				Title = model.Title
+			});
+			if (element != null && element.Id != model.Id)
+			{
+				throw new InvalidOperationException("Группа с таким названием уже есть");
+			}
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/ResultOfControlLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/ResultOfControlLogic.cs
new file mode 100644
index 0000000..593b122
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/ResultOfControlLogic.cs
@@ -0,0 +1,109 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class ResultOfControlLogic : IResultOfControlLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IResultOfControlStorage _resultStorage;
+		public ResultOfControlLogic(ILogger<ResultOfControlLogic> logger, IResultOfControlStorage resultStorage)
+		{
+			_logger = logger;
+			_resultStorage = resultStorage;
+		}
+		public bool Create(ResultOfControlBindingModel model)
+		{
+			CheckModel(model);
+			if (_resultStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+			return true;
+		}
+		public bool Delete(ResultOfControlBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_resultStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+		public ResultOfControlViewModel? ReadElement(ResultOfControlSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
+			var element = _resultStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+		public List<ResultOfControlViewModel>? ReadList(ResultOfControlSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Id:{ Id}", model?.Id);
+			var list = model == null ? _resultStorage.GetFullList() : _resultStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+		public bool Update(ResultOfControlBindingModel model)
+		{
+			CheckModel(model);
+			if (_resultStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+		private void CheckModel(ResultOfControlBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Form))
+			{
+				throw new ArgumentNullException("Нет формы", nameof(model.Form));
+			}
+			if (string.IsNullOrEmpty(model.Mark))
+			{
+				throw new ArgumentNullException("Нет оценки", nameof(model.Mark));
+			}
+			if (model.StudentId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор студента", nameof(model.StudentId));
+			}
+			if (model.StatementId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор ведомости", nameof(model.StatementId));
+			}
+
+			_logger.LogInformation("ResultOfControl. Form:{Form}.Mark:{Mark}.StudentId:{StudentId}.StatementId:{StatementId}.Id:{Id}",
+				model.Form, model.Mark, model.StudentId, model.StatementId, model.Id);
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StatementLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StatementLogic.cs
new file mode 100644
index 0000000..27abf77
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StatementLogic.cs
@@ -0,0 +1,105 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class StatementLogic : IStatementLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IStatementStorage _statementStorage;
+		public StatementLogic(ILogger<StatementLogic> logger, IStatementStorage statementStorage)
+		{
+			_logger = logger;
+			_statementStorage = statementStorage;
+		}
+		public bool Create(StatementBindingModel model)
+		{
+			CheckModel(model);
+			if (_statementStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+			return true;
+		}
+		public bool Delete(StatementBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_statementStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+		public StatementViewModel? ReadElement(StatementSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
+			var element = _statementStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+		public List<StatementViewModel>? ReadList(StatementSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Id:{ Id}", model?.Id);
+			var list = model == null ? _statementStorage.GetFullList() : _statementStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+		public bool Update(StatementBindingModel model)
+		{
+			CheckModel(model);
+			if (_statementStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+		private void CheckModel(StatementBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (model.DisciplineId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор дисциплины", nameof(model.DisciplineId));
+			}
+			if (model.GroupId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор группы", nameof(model.GroupId));
+			}
+			if (model.TeacherId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор преподавателя", nameof(model.TeacherId));
+			}
+
+			_logger.LogInformation("Statement. DisciplineId:{DisciplineId}.GroupId:{GroupId}.TeacherId:{TeacherId}.Id:{Id}",
+				model.DisciplineId, model.GroupId, model.TeacherId, model.Id);
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StudentLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StudentLogic.cs
new file mode 100644
index 0000000..ad61788
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/StudentLogic.cs
@@ -0,0 +1,109 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class StudentLogic : IStudentLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IStudentStorage _studentStorage;
+		public StudentLogic(ILogger<StudentLogic> logger, IStudentStorage studentStorage)
+		{
+			_logger = logger;
+			_studentStorage = studentStorage;
+		}
+		public bool Create(StudentBindingModel model)
+		{
+			CheckModel(model);
+			if (_studentStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+			return true;
+		}
+		public bool Delete(StudentBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_studentStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+		public StudentViewModel? ReadElement(StudentSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
+			var element = _studentStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+		public List<StudentViewModel>? ReadList(StudentSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
+			var list = model == null ? _studentStorage.GetFullList() : _studentStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+		public bool Update(StudentBindingModel model)
+		{
+			CheckModel(model);
+			if (_studentStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+		private void CheckModel(StudentBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Name))
+			{
+				throw new ArgumentNullException("Нет имени студента", nameof(model.Name));
+			}
+			if (model.GroupId <= 0)
+			{
+				throw new ArgumentNullException("Некорректный идентификатор группы", nameof(model.GroupId));
+			}
+
+			_logger.LogInformation("Student. Name:{Name}.GroupId:{GroupId}.Id:{Id}",
+				model.Name, model.GroupId, model.Id);
+			var element = _studentStorage.GetElement(new StudentSearchModel
+			{
+				Name = model.Name
+			});
+			if (element != null && element.Id != model.Id)
+			{
+				throw new InvalidOperationException("Студент с таким именем уже есть");
+			}
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/TeacherLogic.cs b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/TeacherLogic.cs
new file mode 100644
index 0000000..f6eb0d4
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/BusinessLogic/TeacherLogic.cs
@@ -0,0 +1,111 @@
+using ElectronicJournalContracts.BindingModels;
+using ElectronicJournalContracts.BusinessLogicContracts;
+using ElectronicJournalContracts.SearchModels;
+using ElectronicJournalContracts.StorageContracts;
+using ElectronicJournalContracts.ViewModels;
+using Microsoft.Extensions.Logging;
+
+namespace ElectronicJournalBusinessLogic.BusinessLogic
+{
+	public class TeacherLogic : ITeacherLogic
+	{
+		private readonly ILogger _logger;
+		private readonly ITeacherStorage _teacherStorage;
+		public TeacherLogic(ILogger<TeacherLogic> logger, ITeacherStorage teacherStorage)
+		{
+			_logger = logger;
+			_teacherStorage = teacherStorage;
+		}
+		public bool Create(TeacherBindingModel model)
+		{
+			CheckModel(model);
+
+			if (_teacherStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+
+			return true;
+		}
+
+		public bool Delete(TeacherBindingModel model)
+		{
+			CheckModel(model, false);
+			_logger.LogInformation("Delete. Id:{Id}", model.Id);
+			if (_teacherStorage.Delete(model) == null)
+			{
+				_logger.LogWarning("Delete operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		public TeacherViewModel? ReadElement(TeacherSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			_logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
+			var element = _teacherStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+			return element;
+		}
+
+		public List<TeacherViewModel>? ReadList(TeacherSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
+			var list = model == null ? _teacherStorage.GetFullList() : _teacherStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+
+		public bool Update(TeacherBindingModel model)
+		{
+			CheckModel(model);
+			if (_teacherStorage.Update(model) == null)
+			{
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		private void CheckModel(TeacherBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (string.IsNullOrEmpty(model.Name))
+			{
+				throw new ArgumentNullException("Нет имени препеодавателя", nameof(model.Name));
+			}
+
+			_logger.LogInformation("Teacher. Name:{Name}.Id:{Id}", model.Name, model.Id);
+			var element = _teacherStorage.GetElement(new TeacherSearchModel
+			{
+				Name = model.Name
+			});
+			if (element != null && element.Id != model.Id)
+			{
+				throw new InvalidOperationException("Преподаватель с таким именем уже есть");
+			}
+		}
+	}
+}
diff --git a/SUBD/ElectronicJournalBusinessLogic/ElectronicJournalBusinessLogic.csproj b/SUBD/ElectronicJournalBusinessLogic/ElectronicJournalBusinessLogic.csproj
new file mode 100644
index 0000000..132c02c
--- /dev/null
+++ b/SUBD/ElectronicJournalBusinessLogic/ElectronicJournalBusinessLogic.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/SUBD/SUBD.sln b/SUBD/SUBD.sln
index 75a0eea..cd327f9 100644
--- a/SUBD/SUBD.sln
+++ b/SUBD/SUBD.sln
@@ -9,7 +9,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ElectronicJournalDataModels
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ElectronicJournalContracts", "ElectronicJournalContracts\ElectronicJournalContracts.csproj", "{374D708E-00B2-4680-8F92-F88173620B09}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ElectronicJournalDatabaseImplement", "ElectronicJournalDatabaseImplement\ElectronicJournalDatabaseImplement.csproj", "{E8170BDE-E00D-4BE3-B62E-C42136C1EB15}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ElectronicJournalDatabaseImplement", "ElectronicJournalDatabaseImplement\ElectronicJournalDatabaseImplement.csproj", "{E8170BDE-E00D-4BE3-B62E-C42136C1EB15}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ElectronicJournalBusinessLogic", "ElectronicJournalBusinessLogic\ElectronicJournalBusinessLogic.csproj", "{8FB5F785-3199-4ABB-80AC-2A06DAA7ECFD}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -33,6 +35,10 @@ Global
 		{E8170BDE-E00D-4BE3-B62E-C42136C1EB15}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E8170BDE-E00D-4BE3-B62E-C42136C1EB15}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E8170BDE-E00D-4BE3-B62E-C42136C1EB15}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8FB5F785-3199-4ABB-80AC-2A06DAA7ECFD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8FB5F785-3199-4ABB-80AC-2A06DAA7ECFD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8FB5F785-3199-4ABB-80AC-2A06DAA7ECFD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8FB5F785-3199-4ABB-80AC-2A06DAA7ECFD}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE