Version: 2017.3

EditorUtility.OpenFilePanelWithFilters

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public static string OpenFilePanelWithFilters (string title, string directory, string[] filters);

Parameters

title Title for dialog.
directory Default directory.
filters File extensions in form { "Image files", "png,jpg,jpeg", "All files", "*" }.

Description

Displays the "open file" dialog and returns the selected path name.