revert to VB and update to new project file format

Pilz.Drawing.Drawing3D.OpenGLRenderer/Preview/ModelPreview.Designer.vb

@@ -0,0 +1,42 @@
+Namespace PreviewN
+
+    <Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()>
+    Partial Class ModelPreview
+        Inherits System.Windows.Forms.Form
+
+        'Form overrides dispose to clean up the component list.
+        <System.Diagnostics.DebuggerNonUserCode()>
+        Protected Overrides Sub Dispose(ByVal disposing As Boolean)
+            Try
+                If disposing AndAlso components IsNot Nothing Then
+                    components.Dispose()
+                End If
+            Finally
+                MyBase.Dispose(disposing)
+            End Try
+        End Sub
+
+        'Required by the Windows Form Designer
+        Private components As System.ComponentModel.IContainer
+
+        'NOTE: The following procedure is required by the Windows Form Designer
+        'It can be modified using the Windows Form Designer.  
+        'Do not modify it using the code editor.
+        <System.Diagnostics.DebuggerStepThrough()>
+        Private Sub InitializeComponent()
+            Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(ModelPreview))
+            Me.SuspendLayout()
+            '
+            'ModelPreview
+            '
+            Me.ClientSize = New System.Drawing.Size(880, 538)
+            Me.DoubleBuffered = True
+            Me.Name = "ModelPreview"
+            Me.Text = "ModelPreview"
+            Me.ResumeLayout(False)
+
+        End Sub
+
+    End Class
+
+End Namespace