Opens the file selected by the user, with read-only permission. The file is specified by the FileDialog.FileName property.
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A System.IO.Stream that specifies the read-only file selected by the user.
The OpenFileDialog.OpenFile method is used to provide a facility to quickly open a file from the dialog box. The file is opened in read-only mode for security purposes. To open a file in read/write mode, you must use another method, such as System.IO.FileStream.