[dotnet] Add dotnet projects and examples

+ Sitemap generator I created while learning the dispose pattern
+ Testing project for learning general C#

dotnet/testing/KlipsConsole/Program.cs

@@ -0,0 +1,14 @@
+using KlipsLibrary;
+
+Klips.SayHello();
+
+int[] arr = { 2, 4, 6, 2, 1, 44, 10 };
+Klips.Print(arr);
+
+Console.WriteLine();
+HashSet<string> set = new HashSet<string>(){ "hi", "my", "name", "is", "shaun" };
+Klips.Print(set);
+Console.WriteLine();
+
+// Test other C# containers
+Klips.TestContainers();