Remove unnecessary files

OOPLab/Exams/StudentExam.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OOPLab.Exams
-{
-    public class StudentExam
-    {
-        private int _score;
-
-        public void SetScore(int score)
-        {
-            if (score < 0 || score > 100)
-            {
-                throw new ArgumentException("Score must be between 0 and 100.");
-            }
-            _score = score;
-        }
-
-        public int GetScore()
-        {
-            return _score;
-        }
-    }
-
-}

OOPLab/Exams/StudentExamV1.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace OOPLab.Exams
-{
-    public class StudentExamV1
-    {
-        public int Grade;
-    }
-}

OOPLab/OOPLab.csproj

-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-  </PropertyGroup>
-
-</Project>

OOPLab/Program.cs

-using OOPLab;
-using OOPLab.Exams;
-using System;
-
-Console.WriteLine("ENCAPSULATION — Student portal");
-
-// Before: any caller can assign an invalid value.
-StudentExamV1 studentV1 = new StudentExamV1();
-studentV1.Grade = 50;
-Console.WriteLine($"Initial Grade: {studentV1.Grade}");
-studentV1.Grade = 999;
-Console.WriteLine($"Invalid Grade is accepted: {studentV1.Grade}");
-
-// After: validated access through public methods.
-StudentExam student = new StudentExam();
-student.SetScore(90);
-Console.WriteLine($"Validated score: {student.GetScore()}");
-try
-{
-    student.SetScore(999);
-}
-catch (ArgumentException ex)
-{
-    Console.WriteLine($"Invalid score rejected: {ex.Message}");
-}
-
-
-