images vb.net file used by another process error - vb.net

Question

I'm writing a little program where I select a picture through an open file dialogue. When I selected a picture I want it to overwrite the current picture and display the new image. Now I don't have any problems with picking an image with a different extension. So when I currently have a .png I can select a .jpg but when I choose an image with the same extension as the current image I get an error:
The process cannot access the file 'C:\Users....\woontypeimages\chalet_foto.jpg' because it is being used by another process.
If ofd.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim sFilename As String = cboWoningtypesWoningtype.SelectedItem.ToString & "_foto" & System.IO.Path.GetExtension(ofd.FileName)
System.IO.File.Copy(ofd.FileName, Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) & "\Camping Relaxx\woontypeimages\" & sFilename, True)
txtWoningtypesFoto.Text = sFilename
updateImages()
End If
Private Sub updateImages()
Try
picFoto.Image = Nothing
txtWoningtypesFoto.BackColor = clrReadonly
txtWoningtypesFoto.ForeColor = Color.Black
picFoto.Image = System.Drawing.Image.FromFile(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) & "\Camping Relaxx\woontypeimages\" & txtWoningtypesFoto.Text)
Catch ex As Exception
txtWoningtypesFoto.BackColor = clrError
txtWoningtypesFoto.ForeColor = Color.White
End Try
Try
picGrondplan.Image = Nothing
txtWoningtypesGrondplan.BackColor = clrReadonly
txtWoningtypesGrondplan.ForeColor = Color.Black
picGrondplan.Image = System.Drawing.Image.FromFile(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) & "\Camping Relaxx\woontypeimages\" & txtWoningtypesGrondplan.Text)
Catch ex As Exception
txtWoningtypesGrondplan.BackColor = clrError
txtWoningtypesGrondplan.ForeColor = Color.White
End Try
End Sub
If anyone could help me I would be pleased
Thanks in advance

Answer 1

Instead of worrying about Dispose() you can instead use the Load(string) method of the PictureBox which won't lock the file.
Me.PictureBox1.Load("C:\test.png")

Answer 2

Use these :
picFoto.Image.Dispose()
picGrondplan.Image.Dispose()
instead of :
picFoto.Image = Nothing
picGrondplan.Image = Nothing
The Image.FromFile method maintains a lock on the source file until the image has been disposed. Setting an object to nothing does not immediately dispose it - the garbage collector will take care of that in its own time (which might well not be until you've closed the form with the picture box on). Dispose is required to immediately free the file handle.