Add project files

ConsoleApp1.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36705.20 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleApp1", "ConsoleApp1\ConsoleApp1.csproj", "{0199A106-1CC7-4407-BE8C-1308445FA97D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0199A106-1CC7-4407-BE8C-1308445FA97D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0199A106-1CC7-4407-BE8C-1308445FA97D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0199A106-1CC7-4407-BE8C-1308445FA97D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0199A106-1CC7-4407-BE8C-1308445FA97D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {95A32CCA-BECB-4410-B525-12A841C71B77}
+	EndGlobalSection
+EndGlobal

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}";
+        }
+    }
+}