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Ex1.HelloWorld/Ex1.HelloWorld.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Ex1.HelloWorld/Program.cs

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+internal class Program
+{
+    private static void Main(string[] args)
+    {
+        Console.WriteLine("Hello, World!");
+    }
+}