Add files for task 1

Tasks/DT1/DT1.csproj

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

Tasks/DT1/DT1_0.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace DT1 {
+    public delegate double GradeCalc(List<int> s);
+    public enum GradeLevel { FirstYear = 1, SecondYear, ThirdYear, FourthYear };
+
+    public class Student {
+        public string FirstName { get; set; }
+        public string LastName { get; set; }
+        public int ID { get; set; }
+        public GradeLevel Year;
+        public List<int> ExamScores;
+        public double Grade { get; set; }
+    }
+
+    public class StudentClass {
+        public Func<Student, string, bool> studentSelector = /* TO BE DONE */ 
+        public GradeCalc gradeCalculator = /* TO BE DONE */
+        public Func<Student, bool> passedSelector = /* TO BE DONE */ 
+
+        #region data
+        public List<Student> students = new List<Student> {
+        new Student {FirstName = "Terry", LastName = "Adams", ID = 120,
+            Year = GradeLevel.SecondYear,
+            ExamScores = new List<int>{ 99, 82, 81, 79}},
+        new Student {FirstName = "Fadi", LastName = "Fakhouri", ID = 116,
+            Year = GradeLevel.ThirdYear,
+            ExamScores = new List<int>{ 99, 86, 90, 94}},
+        new Student {FirstName = "Hanying", LastName = "Feng", ID = 117,
+            Year = GradeLevel.FirstYear,
+            ExamScores = new List<int>{ 93, 92, 80, 87}},
+        new Student {FirstName = "Cesar", LastName = "Garcia", ID = 114,
+            Year = GradeLevel.FourthYear,
+            ExamScores = new List<int>{ 97, 89, 85, 82}},
+        new Student {FirstName = "Debra", LastName = "Garcia", ID = 115,
+            Year = GradeLevel.ThirdYear,
+            ExamScores = new List<int>{ 35, 72, 91, 70}},
+        new Student {FirstName = "Hugo", LastName = "Garcia", ID = 118,
+            Year = GradeLevel.SecondYear,
+            ExamScores = new List<int>{ 92, 90, 83, 78}},
+        new Student {FirstName = "Sven", LastName = "Mortensen", ID = 113,
+            Year = GradeLevel.FirstYear,
+            ExamScores = new List<int>{ 88, 94, 65, 91}},
+        new Student {FirstName = "Claire", LastName = "O'Donnell", ID = 112,
+            Year = GradeLevel.FourthYear,
+            ExamScores = new List<int>{ 75, 84, 91, 39}},
+        new Student {FirstName = "Svetlana", LastName = "Omelchenko", ID = 111,
+            Year = GradeLevel.SecondYear,
+            ExamScores = new List<int>{ 97, 92, 81, 60}},
+        new Student {FirstName = "Lance", LastName = "Tucker", ID = 119,
+            Year = GradeLevel.ThirdYear,
+            ExamScores = new List<int>{ 68, 79, 88, 92}},
+        new Student {FirstName = "Michael", LastName = "Tucker", ID = 122,
+            Year = GradeLevel.FirstYear,
+            ExamScores = new List<int>{ 94, 92, 91, 91}},
+        new Student {FirstName = "Eugene", LastName = "Zabokritski", ID = 121,
+            Year = GradeLevel.FourthYear,
+            ExamScores = new List<int>{ 96, 85, 91, 60}}
+    };
+        #endregion
+
+        public List<Student> AddGrades(GradeCalc calc) {
+            foreach (Student s in students) {
+                s.Grade = calc(s.ExamScores);
+            }
+            return students;
+        }
+
+        public List<Student> SearchStudent(Func<Student, string, bool> select, String lastName) {
+            List<Student> result = new List<Student>();
+            foreach (Student s in students) {
+                if (select(s, lastName)) result.Add(s);
+            }
+            return result;
+        }
+
+        public IEnumerable<Student> QueryPassed(Func<Student,bool> passed) {
+            return /* TO BE DONE */ 
+        }
+
+        static void show(String titel, List<Student> students) {
+            Console.WriteLine(titel);
+            foreach (var item in students) {
+                Console.WriteLine(String.Format("{0} {1} {2}", item.FirstName, item.LastName, item.Grade));
+            }
+        }
+        
+        public static void Main(string[] args) {
+            StudentClass sc = new StudentClass();
+            show("Grades", sc.AddGrades(sc.gradeCalculator));
+            show("\nStudent Carcia",sc.SearchStudent(sc.studentSelector, "Garcia"));
+            show("\nPassed 4th", sc.QueryPassed(sc.passedSelector).ToList<Student>());
+            // Keep the console window open in debug mode.
+            Console.WriteLine("Press any key to exit");
+            Console.ReadKey();
+        }
+        
+        
+    }
+    public static class ListUtils {
+        public static IEnumerable<T> ... /* TO BE DONE */
+    }
+
+}