System.Drawing.Icon icon = System.Drawing.Icon.ExtractAssociatedIcon(str_ExePath);System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(                                icon.Handle,                                new Int32Rect(0, 0, icon.Width, icon.Height),                                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());

返回类型 System.Windows.Media.Imaging.BitmapSource