.net 472 example (#440)

ok

examples/WireMock.Net.Client.Net472/Program.cs

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+using Newtonsoft.Json;
+using RestEase;
+using System;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Threading.Tasks;
+using WireMock.Client;
+
+namespace WireMock.Net.Client.Net472
+{
+    class Program
+    {
+        static async Task Main(string[] args)
+        {
+            // Create an implementation of the IWireMockAdminApi and pass in the base URL for the API.
+            var api = RestClient.For<IWireMockAdminApi>("http://localhost:9091");
+
+            // Set BASIC Auth
+            var value = Convert.ToBase64String(Encoding.ASCII.GetBytes("a:b"));
+            api.Authorization = new AuthenticationHeaderValue("Basic", value);
+
+            var settings1 = await api.GetSettingsAsync();
+            Console.WriteLine($"settings1 = {JsonConvert.SerializeObject(settings1)}");
+        }
+    }
+
+    //public interface IWireMockAdminApi
+    //{
+    //    /// <summary>
+    //    /// Authentication header
+    //    /// </summary>
+    //    [Header("Authorization")]
+    //    AuthenticationHeaderValue Authorization { get; set; }
+    //}
+}