Add project files

ConsoleApp1/ConsoleApp1.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>

ConsoleApp1/ISystem.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    internal interface ISystem
+    {
+        bool Start();
+        void Restart();
+        void Quit();
+    }
+}

ConsoleApp1/Program.cs

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+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

ConsoleApp1/System.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    public class System : ISystem
+    {
+        private string name;
+        private string version;
+        private string sn;
+
+        public System(string name, string version, string sn)
+        {
+            this.name = name;
+            this.version = version;
+            this.sn = sn;
+        }
+
+        public string Name => this.name;
+        public string Version => this.version;
+        public string SN => this.sn;
+
+        public override string ToString()
+        {
+            return $"Name: {this.name}\nVersion: {this.version}";
+        }
+    }
+}