C# 文件打开对话框 图片fitter

"All Image Files|*.bmp;*.ico;*.gif;*.jpeg;*.jpg;*.png;*.tif;*.tiff|"
"Windows Bitmap(*.bmp)|*.bmp|"
"Windows Icon(*.ico)|*.ico|"
"Graphics Interchange Format (*.gif)|(*.gif)|"
"JPEG File Interchange Format (*.jpg)|*.jpg;*.jpeg|"
"Portable Network Graphics (*.png)|*.png|"
"Tag Image File Format (*.tif)|*.tif;*.tiff"