Recursive sample added for TreeNode iteratation (#1058)

* Non-recursive tree traversal C# sample added

* Changed formatting to reflect markdown correctly

* Formatting updated

* Updated sentence

* Update to confirm to ESlint changes

* Resolve  indentation mismatch

* Correctly link the xref

* Added C# code snippets for iteration over TreeView

* Add reference to c# code snippet

* Added a ref to the code snippet for recursive c#

* Fix comment

* VisualBasic code snippet for TreeViewTraversal

* Updated vb reference to code snippet

* Cpp gitignore updated

* Added cpp snippet for TreeView iteration

* C# commenting out print calls

* Vb commenting out print calls

* Reorder Folder Structure cpp

* Document updated with code snippets

* C# proj prpgrp updated

* VB prpgrp added

* Cpp prpgrp added

* Fixed typo

* Add description, update date

* Updating to match the two sections in style

* Adding teh snippets.5000.json file

* Update dotnet-desktop-guide/framework/winforms/controls/how-to-iterate-through-all-nodes-of-a-windows-forms-treeview-control.md

* Update dotnet-desktop-guide/framework/winforms/controls/how-to-iterate-through-all-nodes-of-a-windows-forms-treeview-control.md

Co-authored-by: Andy (Steve) De George <[email protected]>

.gitignore

@@ -44,3 +44,27 @@ ehthumbs_vista.db
 [Oo]bj/
 *.sln
 *.user
+
+# C++
+# Compiled Object files
+*.slo
+*.lo
+*.o
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+
+# Visual Studio Files
+Debug
+Release
+*.suo
+*.csproj.user
+*.vbproj.user
+ipch
+*sdf