правки

StudentProgressRecord/Entity/Department.cs

@@ -25,3 +25,4 @@ namespace StudentProgressRecord.Entity
             };
         }
     }
+}

StudentProgressRecord/IRepositories/IGroupRepository.cs

@@ -1,8 +1,9 @@
-using System;
+using StudentProgressRecord.Entity;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using System.Text.RegularExpressions;
+
 using System.Threading.Tasks;
 
 namespace StudentProgressRecord.Repositories

StudentProgressRecord/Program.cs

@@ -1,3 +1,4 @@
+
 namespace StudentProgressRecord
 {
     internal static class Program
@@ -13,5 +14,6 @@ namespace StudentProgressRecord
             ApplicationConfiguration.Initialize();
             Application.Run(new Form1());
         }
+
     }
 }

StudentProgressRecord/RepositoryImp/GroupRepository.cs

@@ -1,13 +1,11 @@
 using StudentProgressRecord.Entity;
-using StudentProgressRecord.Repositories;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-
 using System.Threading.Tasks;
 
-namespace StudentProgressRecord.RepositoryImp
+namespace StudentProgressRecord.Repositories
 {
     public class GroupRepository : IGroupRepository
     {