revert to VB and update to new project file format

Pilz.UI/PaintingControl/EventArgs/PaintingObjectEventArgs.vb

@@ -0,0 +1,16 @@
+Imports System.Drawing
+Imports System.IO
+Imports System.Windows.Forms
+Imports Newtonsoft.Json
+Imports Newtonsoft.Json.Linq
+
+Public Class PaintingObjectEventArgs
+    Inherits EventArgs
+
+    Public ReadOnly Property PaintingObjects As PaintingObject() = Nothing
+
+    Friend Sub New(paintingObjects As PaintingObject())
+        _PaintingObjects = paintingObjects
+    End Sub
+
+End Class