Projektdateien hinzufügen.

BeispielAssoziation/BeispielAssoziation.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

BeispielAssoziation/Class.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BeispielAssoziation
+{
+    internal class Class
+    {
+        private Room room;
+        private string name;
+
+        public Class(string name)
+        {
+            this.name = name;
+        }
+        public string GetName() { return name; }
+        public void SetRoom(Room room)
+        { 
+            this.room = room;
+            this.room.SetClass(this);
+        }
+        public void PrintInfos()
+        {
+            Console.WriteLine($"Diese Klasse ist im Raum {room.Get_Name()}.");
+        }
+    }
+}

BeispielAssoziation/Program.cs

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+namespace BeispielAssoziation
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Class oop = new Class("OOP");
+            Class sql = new Class("SQL");
+
+            Room r1 = new Room("1");
+            Room r2 = new Room("2");
+
+            oop.SetRoom(r1);
+            sql.SetRoom(r2);
+
+            oop.PrintInfos();
+            sql.PrintInfos();
+            r1.PrintInfos();
+            r2.PrintInfos();
+        }
+    }
+}

BeispielAssoziation/Room.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BeispielAssoziation
+{
+    internal class Room
+    {
+        private Class _class;
+        private string _name;
+
+        public Room(string name)
+        {
+            this._name = name;
+        }
+        public string Get_Name() { return _name; }
+        public void SetClass(Class _class)
+        {
+            this._class = _class;
+        }
+        public void PrintInfos()
+        {
+            Console.WriteLine($"In diesem Raum ist die Klasse {_class.GetName()}.");
+        }
+    }
+}