diff --git a/.vs/prog2-ss2020-wienkop/v16/.suo b/.vs/prog2-ss2020-wienkop/v16/.suo
index b612d53acbbb1083334176e8a85028dd93d5a88c..3d6b5bc4363f4fd7c162f872adfc1c6c4f02b0a9 100644
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diff --git a/01Buergeramt/obj/Debug/netcoreapp3.1/01Uebg_Buergeramt-Mo.csprojAssemblyReference.cache b/01Buergeramt/obj/Debug/netcoreapp3.1/01Uebg_Buergeramt-Mo.csprojAssemblyReference.cache
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diff --git a/01Indexer/obj/Debug/netcoreapp3.1/01Indexer.csprojAssemblyReference.cache b/01Indexer/obj/Debug/netcoreapp3.1/01Indexer.csprojAssemblyReference.cache
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diff --git a/01OperatorTrueFalse/obj/Debug/netcoreapp3.1/01OperatorTrueFalse.csprojAssemblyReference.cache b/01OperatorTrueFalse/obj/Debug/netcoreapp3.1/01OperatorTrueFalse.csprojAssemblyReference.cache
index 308f84f1bd32b1f7e1467356eb1ac40d7da08d5e..baab94ac361f7cb1eaaa590c9a0a6503cd61bd2c 100644
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diff --git a/03BinTree/obj/Debug/netcoreapp3.1/03BinTree.csprojAssemblyReference.cache b/03BinTree/obj/Debug/netcoreapp3.1/03BinTree.csprojAssemblyReference.cache
index d7dd684443de8ada82f92a8e0cf14a64b9096fd6..a0fbfd12797557adefa2aaaacd9d5126dec64303 100644
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diff --git a/04 UebgDi Vererbung/04 UebgDi Vererbung.csproj b/04 UebgDi Vererbung/04 UebgDi Vererbung.csproj
new file mode 100644
index 0000000000000000000000000000000000000000..76c87b65d16085ba31c86d31a318a9429c4d9267
--- /dev/null
+++ b/04 UebgDi Vererbung/04 UebgDi Vererbung.csproj	
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>_04_UebgDi_Vererbung</RootNamespace>
+  </PropertyGroup>
+
+</Project>
diff --git a/04 UebgDi Vererbung/Program.cs b/04 UebgDi Vererbung/Program.cs
new file mode 100644
index 0000000000000000000000000000000000000000..5fa24c1301d7b65d44d7d1696eb816c0a6156f6c
--- /dev/null
+++ b/04 UebgDi Vererbung/Program.cs	
@@ -0,0 +1,27 @@
+using System;
+
+namespace _04_UebgDi_Vererbung
+{
+    //Schreiben Sie drei Klassen Dreieck, Rechteck und Kreis mit jeweils einem Konstruktor
+    //    Dreieck (int p1x, int p1y, int p2x, int p2y, int p3x, int p3y)
+    //    Rechteck(int topX, int topY, int width, int height)
+    //    Circle(int x, int y, int r)
+    // Erstellen Sie in Main() ein Feld in dem Sie diese Objekte miteinander speichern können -
+    // hierfür ist die Erstellung einer gemeinsamen Basisklasse erforderlich -
+    // und schreiben Sie eine for/foreach-Schleife, die für die jeweiligen Feldeinträge
+    // die entsprechende Ausgabe()-Methode aufruft. Hier reicht es aus, z.B. einfach Kreis(x,y,r) 
+    // auszugeben.
+    class Dreieck
+    { }
+    class Rechteck
+    { }
+    class Kreis
+    { }
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}
diff --git a/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.dgspec.json b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.dgspec.json
new file mode 100644
index 0000000000000000000000000000000000000000..f48bd0c512c35ccf8a77e0720b9e3883e9efa24f
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.dgspec.json	
@@ -0,0 +1,60 @@
+{
+  "format": 1,
+  "restore": {
+    "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj": {}
+  },
+  "projects": {
+    "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj",
+        "projectName": "04 UebgDi Vererbung",
+        "projectPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj",
+        "packagesPath": "C:\\Users\\wienkop\\.nuget\\packages\\",
+        "outputPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\obj\\",
+        "projectStyle": "PackageReference",
+        "configFilePaths": [
+          "C:\\Users\\wienkop\\AppData\\Roaming\\NuGet\\NuGet.Config",
+          "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
+        ],
+        "originalTargetFrameworks": [
+          "netcoreapp3.1"
+        ],
+        "sources": {
+          "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+          "https://api.nuget.org/v3/index.json": {}
+        },
+        "frameworks": {
+          "netcoreapp3.1": {
+            "projectReferences": {}
+          }
+        },
+        "warningProperties": {
+          "warnAsError": [
+            "NU1605"
+          ]
+        }
+      },
+      "frameworks": {
+        "netcoreapp3.1": {
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\3.1.201\\RuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.props b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.props
new file mode 100644
index 0000000000000000000000000000000000000000..dcb699c0e9a92aa0db59dc7c324b470d0dce8c74
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.props	
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\wienkop\.nuget\packages\</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">5.5.0</NuGetToolVersion>
+  </PropertyGroup>
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.targets b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.targets
new file mode 100644
index 0000000000000000000000000000000000000000..53cfaa19b16f3769b2bfc33db3b5c0053c16fdba
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/04 UebgDi Vererbung.csproj.nuget.g.targets	
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+  </PropertyGroup>
+</Project>
\ No newline at end of file
diff --git a/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfo.cs b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfo.cs
new file mode 100644
index 0000000000000000000000000000000000000000..5e5530f964270e244ab3f73142c148d054eaf10f
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfo.cs	
@@ -0,0 +1,23 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Dieser Code wurde von einem Tool generiert.
+//     Laufzeitversion:4.0.30319.42000
+//
+//     Änderungen an dieser Datei können falsches Verhalten verursachen und gehen verloren, wenn
+//     der Code erneut generiert wird.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("04 UebgDi Vererbung")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyProductAttribute("04 UebgDi Vererbung")]
+[assembly: System.Reflection.AssemblyTitleAttribute("04 UebgDi Vererbung")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Von der MSBuild WriteCodeFragment-Klasse generiert.
+
diff --git a/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfoInputs.cache b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfoInputs.cache
new file mode 100644
index 0000000000000000000000000000000000000000..6f60be96936b24c76377f18c87dc3b0608a7428a
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.AssemblyInfoInputs.cache	
@@ -0,0 +1 @@
+9ebcacd2e6aad8a7e5ef47be13528ac4e44c24dc
diff --git a/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.assets.cache b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.assets.cache
new file mode 100644
index 0000000000000000000000000000000000000000..ccb17ebe7b93ed66718f5b7b5ce7a89e7a48a39d
Binary files /dev/null and b/04 UebgDi Vererbung/obj/Debug/netcoreapp3.1/04 UebgDi Vererbung.assets.cache differ
diff --git a/04 UebgDi Vererbung/obj/project.assets.json b/04 UebgDi Vererbung/obj/project.assets.json
new file mode 100644
index 0000000000000000000000000000000000000000..a3f1948dd9deb2d870291428517db859e7285c7f
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/project.assets.json	
@@ -0,0 +1,65 @@
+{
+  "version": 3,
+  "targets": {
+    ".NETCoreApp,Version=v3.1": {}
+  },
+  "libraries": {},
+  "projectFileDependencyGroups": {
+    ".NETCoreApp,Version=v3.1": []
+  },
+  "packageFolders": {
+    "C:\\Users\\wienkop\\.nuget\\packages\\": {}
+  },
+  "project": {
+    "version": "1.0.0",
+    "restore": {
+      "projectUniqueName": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj",
+      "projectName": "04 UebgDi Vererbung",
+      "projectPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj",
+      "packagesPath": "C:\\Users\\wienkop\\.nuget\\packages\\",
+      "outputPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\obj\\",
+      "projectStyle": "PackageReference",
+      "configFilePaths": [
+        "C:\\Users\\wienkop\\AppData\\Roaming\\NuGet\\NuGet.Config",
+        "C:\\Program Files (x86)\\NuGet\\Config\\Microsoft.VisualStudio.Offline.config"
+      ],
+      "originalTargetFrameworks": [
+        "netcoreapp3.1"
+      ],
+      "sources": {
+        "C:\\Program Files (x86)\\Microsoft SDKs\\NuGetPackages\\": {},
+        "https://api.nuget.org/v3/index.json": {}
+      },
+      "frameworks": {
+        "netcoreapp3.1": {
+          "projectReferences": {}
+        }
+      },
+      "warningProperties": {
+        "warnAsError": [
+          "NU1605"
+        ]
+      }
+    },
+    "frameworks": {
+      "netcoreapp3.1": {
+        "imports": [
+          "net461",
+          "net462",
+          "net47",
+          "net471",
+          "net472",
+          "net48"
+        ],
+        "assetTargetFallback": true,
+        "warn": true,
+        "frameworkReferences": {
+          "Microsoft.NETCore.App": {
+            "privateAssets": "all"
+          }
+        },
+        "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\3.1.201\\RuntimeIdentifierGraph.json"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/04 UebgDi Vererbung/obj/project.nuget.cache b/04 UebgDi Vererbung/obj/project.nuget.cache
new file mode 100644
index 0000000000000000000000000000000000000000..e1ed99392c128f7a2aa584de3de063ef096add0d
--- /dev/null
+++ b/04 UebgDi Vererbung/obj/project.nuget.cache	
@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "IH1qRESDMUsFTg1VhNuXPKREMGXmKuBoSuxMs++Uvy2hIv9q7/+XWVvW88XnYwTXTy9W8KYQdxX6V3LC5H+FSQ==",
+  "success": true,
+  "projectFilePath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgDi Vererbung\\04 UebgDi Vererbung.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}
\ No newline at end of file
diff --git a/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.csprojAssemblyReference.cache b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.csprojAssemblyReference.cache
index 8a5ef041ae8402be96bf3fc66b33aedfc9a2f5c5..74fe67b1ca671095970d4a7fbcae2417231e8f41 100644
Binary files a/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.csprojAssemblyReference.cache and b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.csprojAssemblyReference.cache differ
diff --git a/prog2-ss2020-wienkop.sln b/prog2-ss2020-wienkop.sln
index f8584312d4265658b91b8e492f34546b9e5c1d47..a098f87d497b6533b5e42e767da895310367e59f 100644
--- a/prog2-ss2020-wienkop.sln
+++ b/prog2-ss2020-wienkop.sln
@@ -42,7 +42,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "03BinTree", "03BinTree\03Bi
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "03VererbungKfzIntro", "03VererbungKfzIntro\03VererbungKfzIntro.csproj", "{10C739D5-1B10-4462-8572-E3604E5C39BB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "04 UebgMo ZyklischeListe", "04 UebgMo ZyklischeListe\04 UebgMo ZyklischeListe.csproj", "{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "04 UebgMo ZyklischeListe", "04 UebgMo ZyklischeListe\04 UebgMo ZyklischeListe.csproj", "{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "04 UebgDi Vererbung", "04 UebgDi Vererbung\04 UebgDi Vererbung.csproj", "{7E563224-8612-4E65-BDD5-875D4DB146EC}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -122,6 +124,10 @@ Global
 		{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7E563224-8612-4E65-BDD5-875D4DB146EC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7E563224-8612-4E65-BDD5-875D4DB146EC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7E563224-8612-4E65-BDD5-875D4DB146EC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7E563224-8612-4E65-BDD5-875D4DB146EC}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE