Initial files

DISandbox/DISandbox.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\QuickDI\QuickDI.csproj" />
+    </ItemGroup>
+
+</Project>

DISandbox/Program.cs

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+using QuickDI;
+
+namespace DISandbox; 
+
+interface IService {
+    public void Log(string message);
+}
+
+class Service : IService {
+    public void Log(string message) {
+        Console.WriteLine($"[Service] {message}");
+    }
+}
+
+interface IOtherService {
+    public Guid Id { get; }
+    
+    public void ShowId() => Console.WriteLine($"[OtherService] ID: {Id}");
+}
+
+class GuidService : IOtherService {
+    public Guid Id { get; } = Guid.NewGuid();
+}
+
+class GuidDependantService(IService logService, IOtherService guidService) {
+    public void LogWithId(string message) {
+        logService.Log($"[GuidDependantService] {message} (ID: {guidService.Id})");
+    }
+}
+
+static class Program {
+    static void Main(string[] args) {
+        var container = new ServiceContainer()
+            .AddSingleton<IService, Service>()
+            .AddTransient<IOtherService, GuidService>()
+            .AddTransient<GuidDependantService, GuidDependantService>();
+
+        var service = container.GetService<IService>();
+        service.Log("Hello, Dependency Injection!");
+        container.GetService<IOtherService>().ShowId();
+        container.GetService<GuidDependantService>().LogWithId("Hello, sent from the dependency.");
+        container.GetService<IService>().Log("Goodbye, Dependency Injection!");
+    }
+}