title: Open multiple file types in a VB.NET openFileDialogBox
body: <p>I have used the filter method of openFileDialogBox to allow multiple file types to be opened, but the user must select which file type they want using the dropdown. Only files with extensions matching the selected file type are visible. </p>
  
  <p>How can I show all files with extensions that match any of my allowed file types? I don't want all files to be visible/openable, just the ones that I have designated.</p>