точно готово 2

ProjectSession/ProjectSession/Forms/FormDiscipline.cs

@@ -47,7 +47,7 @@ namespace ProjectSession.Forms
         {
             try
             {
-                if (string.IsNullOrWhiteSpace(textBoxName.Text) || comboBoxType.SelectedIndex < 1)
+                if (string.IsNullOrWhiteSpace(textBoxName.Text) || comboBoxType.SelectedIndex < 0)
                 {
                     throw new Exception("Имеются незаполненныеполя");
                 }

ProjectSession/ProjectSession/Forms/FormGroup.cs

@@ -47,7 +47,7 @@ namespace ProjectSession.Forms
         {
             try
             {
-                if (string.IsNullOrWhiteSpace(textBoxName.Text) || comboBoxType.SelectedIndex<1)
+                if (string.IsNullOrWhiteSpace(textBoxName.Text) || comboBoxType.SelectedIndex<0)
                 {
                     throw new Exception("Имеются незаполненныеполя");
                 }

ProjectSession/ProjectSession/Forms/FormStudent.cs

@@ -66,7 +66,7 @@ namespace ProjectSession.Forms
         {
             try
             {
-                if (string.IsNullOrWhiteSpace(textBoxStudentFirstName.Text) || string.IsNullOrWhiteSpace(textBoxStudentLastName.Text) || comboBoxStudentGroup.SelectedIndex < 0)
+                if (string.IsNullOrWhiteSpace(textBoxStudentFirstName.Text) || string.IsNullOrWhiteSpace(textBoxStudentLastName.Text) || comboBoxStudentGroup.SelectedIndex < 0 || checkedListBoxStudentStatus.SelectedIndex<0)
                 {
                     throw new Exception("Имеются незаполненныеполя");
                 }

ProjectSession/ProjectSession/Forms/FormTeacher.cs

@@ -55,7 +55,7 @@ namespace ProjectSession.Forms
             try
             {
                 if (string.IsNullOrWhiteSpace(textBoxTeacherFirstName.Text) || string.IsNullOrWhiteSpace(textBoxTeacherLastName.Text) 
-                    || comboBoxTeacherPost.SelectedIndex < 1|| dataGridViewDisciplines.RowCount < 1 )
+                    || comboBoxTeacherPost.SelectedIndex < 0|| dataGridViewDisciplines.RowCount < 1 )
                 {
                     throw new Exception("Имеются незаполненныеполя");
                 }

ProjectSession/ProjectSession/Repositories/IConnectionString.cs

@@ -0,0 +1,7 @@
+namespace ProjectSession.Repositories
+{
+    public interface IConnectionString
+    {
+        public string ConnectionString { get;}
+    }
+}

ProjectSession/ProjectSession/Repositories/Implementations/ConnectionString.cs

@@ -0,0 +1,8 @@
+
+namespace ProjectSession.Repositories
+{
+    public class ConnectionString : IConnectionString
+    {
+        string IConnectionString.ConnectionString => "Host=localhost;Port=5432;Username=postgres;Password=postgres;Database=otp";
+    }
+}

ProjectSession/ProjectSession/Repositories/Implementations/GroupRepository.cs

@@ -1,9 +1,5 @@
 using ProjectSession.Entities;
-using System;
+
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace ProjectSession.Repositories.Implementations
 {

ProjectSession/ProjectSession/appsettings.json

@@ -0,0 +1,15 @@
+{
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.File" ],
+    "MinimumLevel": "Debug",
+    "WriteTo": [
+      {
+        "Name": "File",
+        "Args": {
+          "path": "Logs/Session_log.txt",
+          "rollingInterval": "Day"
+        }
+      }
+    ]
+  }
+}