Push Examples (#3735)

extra/push-examples/csharp/index.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Net;
+using System.Threading;
+
+/**
+ * Compile: C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe index.cs
+ * Run: index.exe
+ */
+class Index
+{
+    const string PushURL  = "https://example.com/api/push/key?status=up&msg=OK&ping=";
+    const int Interval = 60;
+
+    static void Main(string[] args)
+    {
+        while (true)
+        {
+            WebClient client = new WebClient();
+            client.DownloadString(PushURL);
+            Console.WriteLine("Pushed!");
+            Thread.Sleep(Interval * 1000);
+        }
+    }
+}