ASP.NET core web api DI example (#950)

* Added example source code

* Removed unnecessary nuget package

examples/webApiDependencyInjection/Controllers/ExampleDependencyInjectionOnConstructorController.cs

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+using k8s;
+using Microsoft.AspNetCore.Mvc;
+
+namespace webApiDependencyInjection.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class ExampleDependencyInjectionOnConstructorController : ControllerBase
+    {
+        private readonly IKubernetes kubernetesClient;
+
+        /// <summary>
+        /// Inject the kubernets class in the constructor.
+        /// </summary>
+        /// <param name="kubernetesClient"></param>
+        public ExampleDependencyInjectionOnConstructorController(IKubernetes kubernetesClient)
+        {
+            this.kubernetesClient = kubernetesClient;
+        }
+
+        /// <summary>
+        /// Example using the kubernetes client obtained from the constructor (this.kubernetesClient).
+        /// </summary>
+        /// <returns></returns>
+        [HttpGet()]
+        public IEnumerable<string> GetPods()
+        {
+            // Read the list of pods contained in default namespace
+            var podList = this.kubernetesClient.CoreV1.ListNamespacedPod("default");
+
+            // Return names of pods
+            return podList.Items.Select(pod => pod.Metadata.Name);
+        }
+    }
+}

examples/webApiDependencyInjection/Controllers/ExampleDependencyInjectionOnMethodController.cs

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+using k8s;
+using Microsoft.AspNetCore.Mvc;
+
+namespace webApiDependencyInjection.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class ExampleDependencyInjectionOnMethodController : ControllerBase
+    {
+        /// <summary>
+        /// Example using the kubernetes client injected directly into the method ([FromServices] IKubernetes kubernetesClient).
+        /// </summary>
+        /// <param name="kubernetes"></param>
+        /// <returns></returns>
+        [HttpGet()]
+        public IEnumerable<string> GetPods([FromServices] IKubernetes kubernetesClient)
+        {
+            // Read the list of pods contained in default namespace
+            var podList = kubernetesClient.CoreV1.ListNamespacedPod("default");
+
+            // Return names of pods
+            return podList.Items.Select(pod => pod.Metadata.Name);
+        }
+    }
+}

examples/webApiDependencyInjection/Program.cs

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+using k8s;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Load kubernetes configuration
+var kubernetesClientConfig = KubernetesClientConfiguration.BuildDefaultConfig();
+
+// Register Kubernetes client interface as sigleton
+builder.Services.AddSingleton<IKubernetes>(new Kubernetes(kubernetesClientConfig));
+
+// Add services to the container.
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+builder.Services.AddControllers();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+// Start the service
+app.Run();
+
+
+// Swagger ui can be accesse at: http://localhost:<yourBindingPort>/swagger

examples/webApiDependencyInjection/appsettings.Development.json

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

examples/webApiDependencyInjection/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

examples/webApiDependencyInjection/webApiDependencyInjection.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Swashbuckle.AspNetCore" Version="6.3.1" />
+    </ItemGroup>
+
+</Project>