diff --git a/.vs/prog2-ss2020-wienkop/DesignTimeBuild/.dtbcache.v2 b/.vs/prog2-ss2020-wienkop/DesignTimeBuild/.dtbcache.v2
index 460e48a7d5e7bc32ebd506e998860c3702bc1bf3..d8c7c88068a42e3eedc0abf8d41fb4e839e4da6d 100644
Binary files a/.vs/prog2-ss2020-wienkop/DesignTimeBuild/.dtbcache.v2 and b/.vs/prog2-ss2020-wienkop/DesignTimeBuild/.dtbcache.v2 differ
diff --git a/.vs/prog2-ss2020-wienkop/v16/.suo b/.vs/prog2-ss2020-wienkop/v16/.suo
index e164e3533021924164a696ef118989abf7fae929..30f293facaa1e2505d739813d9876a429cb1159f 100644
Binary files a/.vs/prog2-ss2020-wienkop/v16/.suo and b/.vs/prog2-ss2020-wienkop/v16/.suo differ
diff --git a/01KlassenWiederholung/obj/Debug/netcoreapp3.1/01KlassenWiederholung.csprojAssemblyReference.cache b/01KlassenWiederholung/obj/Debug/netcoreapp3.1/01KlassenWiederholung.csprojAssemblyReference.cache
index 9f4bd98749eb5f85c5249b4582b96dc7ea27d580..76bf24034ca333bd840757e825bd933d05e71b33 100644
Binary files a/01KlassenWiederholung/obj/Debug/netcoreapp3.1/01KlassenWiederholung.csprojAssemblyReference.cache and b/01KlassenWiederholung/obj/Debug/netcoreapp3.1/01KlassenWiederholung.csprojAssemblyReference.cache differ
diff --git a/04 UebgMo ZyklischeListe/04 UebgMo ZyklischeListe.csproj b/04 UebgMo ZyklischeListe/04 UebgMo ZyklischeListe.csproj
new file mode 100644
index 0000000000000000000000000000000000000000..9ea06bd95bc39a57315a898afe42823bd5c0a522
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/04 UebgMo ZyklischeListe.csproj	
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>_04_UebgMo_ZyklischeListe</RootNamespace>
+  </PropertyGroup>
+
+</Project>
diff --git a/04 UebgMo ZyklischeListe/Program.cs b/04 UebgMo ZyklischeListe/Program.cs
new file mode 100644
index 0000000000000000000000000000000000000000..719039d485214aeec4ab9f7244b67f27523ec098
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/Program.cs	
@@ -0,0 +1,60 @@
+using System;
+
+namespace _04_UebgMo_ZyklischeListe
+{
+    class CycleList
+    {
+        class Element
+        {
+            public string name;
+            public Element next = null;
+            public Element(string name) { this.name = name; }
+            public override string ToString() => name;
+        }
+        Element anf = null, ende = null;
+        Element iterator = null;
+        public void AddEnd(string name)
+        {
+            
+        }
+        public void CloseCycle()
+        {
+            
+        }
+        public void Print()
+        {
+            
+        }
+        public void SetIterator(int offset = 0)
+        {
+            
+        }
+        public string GetName() ;
+        public void MoveNext() {  }
+    }
+
+    // ===========================================================
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            CycleList cl = new CycleList();
+            cl.AddEnd("Anton");
+            cl.AddEnd("Berta");
+            cl.CloseCycle();
+            cl.Print();
+            Console.WriteLine("-------------");
+            cl.AddEnd("Claudia");
+            cl.AddEnd("Dieter");
+            cl.CloseCycle();
+            cl.Print();
+            Console.WriteLine("-------------");
+            cl.SetIterator(2);
+            for (int i = 0; i < 10; i++)
+            {
+                Console.WriteLine(cl.GetName());
+                cl.MoveNext();
+            }
+        }
+    }
+}
diff --git a/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.dgspec.json b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.dgspec.json
new file mode 100644
index 0000000000000000000000000000000000000000..5a04c2f3a1b9753af7b61cd91c8078682a4a7832
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.dgspec.json	
@@ -0,0 +1,60 @@
+{
+  "format": 1,
+  "restore": {
+    "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj": {}
+  },
+  "projects": {
+    "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj",
+        "projectName": "04 UebgMo ZyklischeListe",
+        "projectPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj",
+        "packagesPath": "C:\\Users\\wienkop\\.nuget\\packages\\",
+        "outputPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\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 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.g.props b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.g.props
new file mode 100644
index 0000000000000000000000000000000000000000..dcb699c0e9a92aa0db59dc7c324b470d0dce8c74
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.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 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.g.targets b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.csproj.nuget.g.targets
new file mode 100644
index 0000000000000000000000000000000000000000..53cfaa19b16f3769b2bfc33db3b5c0053c16fdba
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/04 UebgMo ZyklischeListe.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 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.AssemblyInfo.cs b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.AssemblyInfo.cs
new file mode 100644
index 0000000000000000000000000000000000000000..b76be7e0be04cfca03ac2e0f12401bc25c40ce57
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.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 UebgMo ZyklischeListe")]
+[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 UebgMo ZyklischeListe")]
+[assembly: System.Reflection.AssemblyTitleAttribute("04 UebgMo ZyklischeListe")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Von der MSBuild WriteCodeFragment-Klasse generiert.
+
diff --git a/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.AssemblyInfoInputs.cache b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.AssemblyInfoInputs.cache
new file mode 100644
index 0000000000000000000000000000000000000000..5c8f6f21860852059455495582c8430df2921e72
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.AssemblyInfoInputs.cache	
@@ -0,0 +1 @@
+2a19470245e2ad1dada1144b57960761346c104d
diff --git a/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.assets.cache b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.assets.cache
new file mode 100644
index 0000000000000000000000000000000000000000..da812d33dd5136e16d8b386367670062bd3c48fa
Binary files /dev/null and b/04 UebgMo ZyklischeListe/obj/Debug/netcoreapp3.1/04 UebgMo ZyklischeListe.assets.cache differ
diff --git a/04 UebgMo ZyklischeListe/obj/project.assets.json b/04 UebgMo ZyklischeListe/obj/project.assets.json
new file mode 100644
index 0000000000000000000000000000000000000000..c8459be2c4a0b28d98acf643bf7562e3c80eb698
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/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 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj",
+      "projectName": "04 UebgMo ZyklischeListe",
+      "projectPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj",
+      "packagesPath": "C:\\Users\\wienkop\\.nuget\\packages\\",
+      "outputPath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\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 UebgMo ZyklischeListe/obj/project.nuget.cache b/04 UebgMo ZyklischeListe/obj/project.nuget.cache
new file mode 100644
index 0000000000000000000000000000000000000000..5b24bb0ce362c8c4d8d7f3c5aa1ff010cbec8486
--- /dev/null
+++ b/04 UebgMo ZyklischeListe/obj/project.nuget.cache	
@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "sQYFwATaGOqgGJy7Ba4zPa7iM025zhIGLRngGdhBNYl/CcAJJz7Bk98ypY2YLeL+hOxN/evd/qpwKiTi1cCw+A==",
+  "success": true,
+  "projectFilePath": "C:\\Users\\wienkop\\source\\repos\\prog2-ss2020-wienkop\\04 UebgMo ZyklischeListe\\04 UebgMo ZyklischeListe.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}
\ No newline at end of file
diff --git a/prog2-ss2020-wienkop.sln b/prog2-ss2020-wienkop.sln
index 31af46826528eccaeeb4b3e5b2e9e075c9e461ae..f8584312d4265658b91b8e492f34546b9e5c1d47 100644
--- a/prog2-ss2020-wienkop.sln
+++ b/prog2-ss2020-wienkop.sln
@@ -40,7 +40,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "03DoppeltverketteteListe",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "03BinTree", "03BinTree\03BinTree.csproj", "{70444B5D-4C58-44B3-B3D4-7F324DA215F5}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "03VererbungKfzIntro", "03VererbungKfzIntro\03VererbungKfzIntro.csproj", "{10C739D5-1B10-4462-8572-E3604E5C39BB}"
+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}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -116,6 +118,10 @@ Global
 		{10C739D5-1B10-4462-8572-E3604E5C39BB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{10C739D5-1B10-4462-8572-E3604E5C39BB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{10C739D5-1B10-4462-8572-E3604E5C39BB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F4E8A476-C0B2-47EE-9F30-76DA37FA5851}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{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
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE