diff --git a/ClassLibraryStandard/.vs/ClassLibraryStandard/DesignTimeBuild/.dtbcache b/ClassLibraryStandard/.vs/ClassLibraryStandard/DesignTimeBuild/.dtbcache
index ae445d7..0ab815f 100644
Binary files a/ClassLibraryStandard/.vs/ClassLibraryStandard/DesignTimeBuild/.dtbcache and b/ClassLibraryStandard/.vs/ClassLibraryStandard/DesignTimeBuild/.dtbcache differ
diff --git a/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/.suo b/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/.suo
index 09f1107..9f58388 100644
Binary files a/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/.suo and b/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/.suo differ
diff --git a/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/Server/sqlite3/storage.ide b/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/Server/sqlite3/storage.ide
index 3862564..ecbb812 100644
Binary files a/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/Server/sqlite3/storage.ide and b/ClassLibraryStandard/.vs/ClassLibraryStandard/v16/Server/sqlite3/storage.ide differ
diff --git a/ClassLibraryStandard/ClassLibraryStandard/XMLhelper.cs b/ClassLibraryStandard/ClassLibraryStandard/XMLhelper.cs
new file mode 100644
index 0000000..7d8b324
--- /dev/null
+++ b/ClassLibraryStandard/ClassLibraryStandard/XMLhelper.cs
@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Xml.Serialization;
+using ClassLibraryStandard;
+
+namespace EntitiesStandard
+{
+    public static class XMLhelper
+    {
+
+
+        public static void serializeToXML<T>(T list )
+        {
+          
+
+            XmlSerializer ser = new XmlSerializer(typeof(List<Participant>));
+
+            FileStream file =  File.OpenWrite(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\data.xml");
+
+            ser.Serialize(file, list);
+
+            file.Close();
+        }
+
+        public static T xmlToDeserialize<T>()
+        {
+            XmlSerializer serializer = new XmlSerializer(typeof(T));
+
+            FileStream file =  File.OpenRead(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\data.xml");
+
+            T blogList = (T) serializer.Deserialize(file);
+
+            //T value = (T) Convert.ChangeType(serializer.Deserialize(file));
+
+            file.Close();
+            return blogList;
+        }
+
+    }
+}
diff --git a/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.dll b/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.dll
index 43e15f2..32bf91a 100644
Binary files a/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.dll and b/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.dll differ
diff --git a/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.pdb b/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.pdb
index 36d960f..75a0871 100644
Binary files a/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.pdb and b/ClassLibraryStandard/ClassLibraryStandard/bin/Debug/netstandard2.0/EntitiesStandard.pdb differ
diff --git a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csproj.CoreCompileInputs.cache b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csproj.CoreCompileInputs.cache
index bd316b7..8b179ee 100644
--- a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csproj.CoreCompileInputs.cache
+++ b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-56bcca95c23602acb987d5b18a78659a4b87bf01
+2b405998b147ec7745f71929a99418b4b119d093
diff --git a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csprojAssemblyReference.cache b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csprojAssemblyReference.cache
index 4a20d15..3dc2793 100644
Binary files a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csprojAssemblyReference.cache and b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.csprojAssemblyReference.cache differ
diff --git a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.dll b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.dll
index 43e15f2..32bf91a 100644
Binary files a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.dll and b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.dll differ
diff --git a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.pdb b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.pdb
index 36d960f..75a0871 100644
Binary files a/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.pdb and b/ClassLibraryStandard/ClassLibraryStandard/obj/Debug/netstandard2.0/EntitiesStandard.pdb differ
diff --git a/ClassLibraryStandard/Service/Program.cs b/ClassLibraryStandard/Service/Program.cs
index b27e028..7d2b174 100644
--- a/ClassLibraryStandard/Service/Program.cs
+++ b/ClassLibraryStandard/Service/Program.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Threading;
 using ClassLibraryStandard;
+using EntitiesStandard;
 
 namespace Service
 {
@@ -33,8 +34,6 @@ namespace Service
             pr4.lastname = "Wurst4";
             parlis.Add(pr4);
 
-
-
             while (true)
             {
                 Thread.Sleep(500);
@@ -44,6 +43,9 @@ namespace Service
                 int tmp = ran.Next(0, 3);
 
                 Console.WriteLine(parlis[tmp]);
+
+                XMLhelper.serializeToXML<List<Participant>>(parlis);
+                
             }
         }
     }
diff --git a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.dll b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.dll
index 43e15f2..32bf91a 100644
Binary files a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.dll and b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.dll differ
diff --git a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.pdb b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.pdb
index 36d960f..75a0871 100644
Binary files a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.pdb and b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/EntitiesStandard.pdb differ
diff --git a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.dll b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.dll
index f12f0f9..6893a20 100644
Binary files a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.dll and b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.dll differ
diff --git a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.pdb b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.pdb
index d7670f6..953333f 100644
Binary files a/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.pdb and b/ClassLibraryStandard/Service/bin/Debug/netcoreapp2.2/Service.pdb differ
diff --git a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.csprojAssemblyReference.cache b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.csprojAssemblyReference.cache
index f6759ae..15fdaea 100644
Binary files a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.csprojAssemblyReference.cache and b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.csprojAssemblyReference.cache differ
diff --git a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.dll b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.dll
index f12f0f9..6893a20 100644
Binary files a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.dll and b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.dll differ
diff --git a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.pdb b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.pdb
index d7670f6..953333f 100644
Binary files a/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.pdb and b/ClassLibraryStandard/Service/obj/Debug/netcoreapp2.2/Service.pdb differ
diff --git a/ClassLibraryStandard/UI/MainWindow.xaml b/ClassLibraryStandard/UI/MainWindow.xaml
index a96715a..af68275 100644
--- a/ClassLibraryStandard/UI/MainWindow.xaml
+++ b/ClassLibraryStandard/UI/MainWindow.xaml
@@ -8,5 +8,6 @@
         Title="MainWindow" Height="450" Width="800">
     <Grid>
         <DataGrid x:Name="datagrid1" HorizontalAlignment="Left" Height="231" Margin="184,94,0,0" VerticalAlignment="Top" Width="384"/>
+        <Button Content="Button" HorizontalAlignment="Left" Margin="328,365,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
     </Grid>
 </Window>
diff --git a/ClassLibraryStandard/UI/MainWindow.xaml.cs b/ClassLibraryStandard/UI/MainWindow.xaml.cs
index 5cf23e2..703b42c 100644
--- a/ClassLibraryStandard/UI/MainWindow.xaml.cs
+++ b/ClassLibraryStandard/UI/MainWindow.xaml.cs
@@ -1,9 +1,12 @@
 using ClassLibraryStandard;
+using EntitiesStandard;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.IO;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
@@ -26,22 +29,52 @@ namespace UI
         {
             InitializeComponent();
 
+           
+        }
+
+        private void Button_Click(object sender, RoutedEventArgs e)
+        {
+            BindingList<Participant> list01 = new BindingList<Participant>();
+
             Participant pr3 = new Participant();
             pr3.name = "Hans3";
             pr3.lastname = "Wurst3";
-
-            List<Participant> par = new List<Participant>();
-
-            BindingList<Participant> list01 = new BindingList<Participant>();
-
             list01.Add(pr3);
 
-            datagrid1.ItemsSource = list01;
+            Participant pr4 = new Participant();
+            pr3.name = "Hans4";
+            pr3.lastname = "Wurst4";
+            list01.Add(pr4);
+
+            
+
+            List<Participant> listpar = new List<Participant>();
+
+            
+
+           
+               // Thread.Sleep(2000);
 
 
+                try
+                {
+                    listpar = XMLhelper.xmlToDeserialize<List<Participant>>();
+                }
+                catch (Exception exception)
+                {
+                    Console.WriteLine(exception);
+                //throw;
+                Thread.Sleep(200);
+            }
+              
 
 
-
-        }
+                foreach (var par in listpar)
+                {
+                    list01.Add(par);
+                    datagrid1.ItemsSource = list01;
+                }
+            }
+        
     }
 }
diff --git a/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.dll b/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.dll
index 43e15f2..32bf91a 100644
Binary files a/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.dll and b/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.dll differ
diff --git a/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.pdb b/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.pdb
index 36d960f..75a0871 100644
Binary files a/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.pdb and b/ClassLibraryStandard/UI/bin/Debug/EntitiesStandard.pdb differ
diff --git a/ClassLibraryStandard/UI/bin/Debug/UI.exe b/ClassLibraryStandard/UI/bin/Debug/UI.exe
index c59b7ae..aad8f8e 100644
Binary files a/ClassLibraryStandard/UI/bin/Debug/UI.exe and b/ClassLibraryStandard/UI/bin/Debug/UI.exe differ
diff --git a/ClassLibraryStandard/UI/bin/Debug/UI.pdb b/ClassLibraryStandard/UI/bin/Debug/UI.pdb
index b4b5dde..1ba0850 100644
Binary files a/ClassLibraryStandard/UI/bin/Debug/UI.pdb and b/ClassLibraryStandard/UI/bin/Debug/UI.pdb differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/DesignTimeResolveAssemblyReferences.cache b/ClassLibraryStandard/UI/obj/Debug/DesignTimeResolveAssemblyReferences.cache
new file mode 100644
index 0000000..c2149d2
Binary files /dev/null and b/ClassLibraryStandard/UI/obj/Debug/DesignTimeResolveAssemblyReferences.cache differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/MainWindow.baml b/ClassLibraryStandard/UI/obj/Debug/MainWindow.baml
index 1d450c6..9ef0711 100644
Binary files a/ClassLibraryStandard/UI/obj/Debug/MainWindow.baml and b/ClassLibraryStandard/UI/obj/Debug/MainWindow.baml differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.cs b/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.cs
index b5f8c13..4c0a2bb 100644
--- a/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.cs
+++ b/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.cs
@@ -1,4 +1,4 @@
-#pragma checksum "..\..\MainWindow.xaml" "{8829d00f-11b8-4213-878b-770e8597ac16}" "795417AB8F41B49EC74B26B9A1C1A059CA80E3679169B674EC266D4C35E9AE25"
+#pragma checksum "..\..\MainWindow.xaml" "{8829d00f-11b8-4213-878b-770e8597ac16}" "6640988C6F05A6430030B2C234F217E83431DDB1C2C7CEFBBFF353D38FC55D39"
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
@@ -81,6 +81,14 @@ namespace UI {
             case 1:
             this.datagrid1 = ((System.Windows.Controls.DataGrid)(target));
             return;
+            case 2:
+            
+            #line 11 "..\..\MainWindow.xaml"
+            ((System.Windows.Controls.Button)(target)).Click += new System.Windows.RoutedEventHandler(this.Button_Click);
+            
+            #line default
+            #line hidden
+            return;
             }
             this._contentLoaded = true;
         }
diff --git a/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.i.cs b/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.i.cs
index b5f8c13..4c0a2bb 100644
--- a/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.i.cs
+++ b/ClassLibraryStandard/UI/obj/Debug/MainWindow.g.i.cs
@@ -1,4 +1,4 @@
-#pragma checksum "..\..\MainWindow.xaml" "{8829d00f-11b8-4213-878b-770e8597ac16}" "795417AB8F41B49EC74B26B9A1C1A059CA80E3679169B674EC266D4C35E9AE25"
+#pragma checksum "..\..\MainWindow.xaml" "{8829d00f-11b8-4213-878b-770e8597ac16}" "6640988C6F05A6430030B2C234F217E83431DDB1C2C7CEFBBFF353D38FC55D39"
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
@@ -81,6 +81,14 @@ namespace UI {
             case 1:
             this.datagrid1 = ((System.Windows.Controls.DataGrid)(target));
             return;
+            case 2:
+            
+            #line 11 "..\..\MainWindow.xaml"
+            ((System.Windows.Controls.Button)(target)).Click += new System.Windows.RoutedEventHandler(this.Button_Click);
+            
+            #line default
+            #line hidden
+            return;
             }
             this._contentLoaded = true;
         }
diff --git a/ClassLibraryStandard/UI/obj/Debug/UI.csprojAssemblyReference.cache b/ClassLibraryStandard/UI/obj/Debug/UI.csprojAssemblyReference.cache
index d0e4512..b9355f8 100644
Binary files a/ClassLibraryStandard/UI/obj/Debug/UI.csprojAssemblyReference.cache and b/ClassLibraryStandard/UI/obj/Debug/UI.csprojAssemblyReference.cache differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/UI.exe b/ClassLibraryStandard/UI/obj/Debug/UI.exe
index c59b7ae..aad8f8e 100644
Binary files a/ClassLibraryStandard/UI/obj/Debug/UI.exe and b/ClassLibraryStandard/UI/obj/Debug/UI.exe differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/UI.g.resources b/ClassLibraryStandard/UI/obj/Debug/UI.g.resources
index 01ae166..fe7e02e 100644
Binary files a/ClassLibraryStandard/UI/obj/Debug/UI.g.resources and b/ClassLibraryStandard/UI/obj/Debug/UI.g.resources differ
diff --git a/ClassLibraryStandard/UI/obj/Debug/UI.pdb b/ClassLibraryStandard/UI/obj/Debug/UI.pdb
index b4b5dde..1ba0850 100644
Binary files a/ClassLibraryStandard/UI/obj/Debug/UI.pdb and b/ClassLibraryStandard/UI/obj/Debug/UI.pdb differ