Add project files.

GoDaddyDDNS.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.2.32526.322
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{0935CA6B-5C67-4503-9700-849721AAA61E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GoDaddyDDNS", "src\GoDaddyDDNS\GoDaddyDDNS.csproj", "{63210018-9CF9-48ED-A99B-BE6B29F2B080}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{63210018-9CF9-48ED-A99B-BE6B29F2B080}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{63210018-9CF9-48ED-A99B-BE6B29F2B080}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{63210018-9CF9-48ED-A99B-BE6B29F2B080}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{63210018-9CF9-48ED-A99B-BE6B29F2B080}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{63210018-9CF9-48ED-A99B-BE6B29F2B080} = {0935CA6B-5C67-4503-9700-849721AAA61E}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {E63BBED3-135D-485D-B166-9EFB05C7AAA3}
+	EndGlobalSection
+EndGlobal

src/GoDaddyDDNS/GoDaddyDDNS.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <UserSecretsId>dotnet-GoDaddyDDNS-FB6B86D1-EE02-4695-9CFC-3552E66F6B4F</UserSecretsId>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
+  </ItemGroup>
+</Project>

src/GoDaddyDDNS/Program.cs

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+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace GoDaddyDDNS
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateHostBuilder(args).Build().Run();
+        }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureServices((hostContext, services) =>
+                {
+                    services.AddHostedService<Worker>();
+                });
+    }
+}

src/GoDaddyDDNS/Properties/launchSettings.json

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+{
+  "profiles": {
+    "GoDaddyDDNS": {
+      "commandName": "Project",
+      "dotnetRunMessages": "true",
+      "environmentVariables": {
+        "DOTNET_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

src/GoDaddyDDNS/Worker.cs

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+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace GoDaddyDDNS
+{
+    public class Worker : BackgroundService
+    {
+        private readonly ILogger<Worker> _logger;
+
+        public Worker(ILogger<Worker> logger)
+        {
+            _logger = logger;
+        }
+
+        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            while (!stoppingToken.IsCancellationRequested)
+            {
+                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
+                await Task.Delay(1000, stoppingToken);
+            }
+        }
+    }
+}

src/GoDaddyDDNS/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

src/GoDaddyDDNS/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}