add patch example (#189)

* add patch example

* fix typo

examples/patch/Program.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using k8s;
+using k8s.Models;
+using Microsoft.AspNetCore.JsonPatch;
+
+namespace patch
+{
+    internal class Program
+    {
+        private static void Main(string[] args)
+        {
+            var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();
+            IKubernetes client = new Kubernetes(config);
+            Console.WriteLine("Starting Request!");
+
+            var pod = client.ListNamespacedPod("default").Items.First();
+
+            var name = pod.Metadata.Name;
+            PrintLabels(pod);
+
+            var newlables = new Dictionary<string, string>(pod.Metadata.Labels)
+            {
+                ["test"] = "test"
+            };
+            var patch = new JsonPatchDocument<V1Pod>();
+            patch.Replace(e => e.Metadata.Labels, newlables);
+            client.PatchNamespacedPod(new V1Patch(patch), name, "default");
+
+            PrintLabels(client.ReadNamespacedPod(name, "default"));
+        }
+
+        private static void PrintLabels(V1Pod pod)
+        {
+            Console.WriteLine($"Lables: for {pod.Metadata.Name}");
+            foreach (var (k, v) in pod.Metadata.Labels)
+            {
+                Console.WriteLine($"{k} : {v}");
+            }
+            Console.WriteLine("=-=-=-=-=-=-=-=-=-=-=");
+        }
+    }
+}

examples/patch/patch.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+  </PropertyGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\src\KubernetesClient\KubernetesClient.csproj" />
+    </ItemGroup>
+
+</Project>