diff --git a/01 Hallo/01 Hallo.csproj b/01 Hallo/01 Hallo.csproj
new file mode 100644
index 0000000000000000000000000000000000000000..15500274b5c49ca7541b96be74f06e364261a651
--- /dev/null
+++ b/01 Hallo/01 Hallo.csproj	
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>_01_Hallo</RootNamespace>
+  </PropertyGroup>
+
+</Project>
diff --git a/01 Hallo/Program.cs b/01 Hallo/Program.cs
new file mode 100644
index 0000000000000000000000000000000000000000..6e0057bb65e6826e29693cec0b41d88a78a7d121
--- /dev/null
+++ b/01 Hallo/Program.cs	
@@ -0,0 +1,14 @@
+using System;
+
+namespace _01_Hallo
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello Uwe!");
+            Console.WriteLine(Math.Sqrt( 3*3+4*4));
+
+        }
+    }
+}
diff --git a/01 Pythagoras/Program.cs b/01 Pythagoras/Program.cs
index c35cdef249062568f8467f068629c5cca81ae6ed..3dea2335e5e04cb1cc146022da31f239c4f84adb 100644
--- a/01 Pythagoras/Program.cs	
+++ b/01 Pythagoras/Program.cs	
@@ -6,7 +6,7 @@ namespace _01_Pythagoras
     {
         static void Main(string[] args)
         {
-            double a, b;
+            double a, b;            // Variablen vom Typ Gleitkommazahl
             Console.WriteLine("Pythagoras");
 
             Console.Write("Länge der Seite a: ");
diff --git a/Prog1_WS2021_22.sln b/Prog1_WS2021_22.sln
index 996e363d0959f172cc8f1f8e9d041d2e671a91ce..8b13a3acf39b007fb1c22b434078ab80270c452b 100644
--- a/Prog1_WS2021_22.sln
+++ b/Prog1_WS2021_22.sln
@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.31702.278
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "01 Pythagoras", "01 Pythagoras\01 Pythagoras.csproj", "{8DC7B6AA-65FE-46EA-B91C-245660F723E8}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "01 Pythagoras", "01 Pythagoras\01 Pythagoras.csproj", "{8DC7B6AA-65FE-46EA-B91C-245660F723E8}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "01 Hallo", "01 Hallo\01 Hallo.csproj", "{DF891CC9-9677-471D-BE07-0B9C679534AB}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{8DC7B6AA-65FE-46EA-B91C-245660F723E8}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8DC7B6AA-65FE-46EA-B91C-245660F723E8}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8DC7B6AA-65FE-46EA-B91C-245660F723E8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DF891CC9-9677-471D-BE07-0B9C679534AB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DF891CC9-9677-471D-BE07-0B9C679534AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DF891CC9-9677-471D-BE07-0B9C679534AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DF891CC9-9677-471D-BE07-0B9C679534AB}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE