نمایش تصاویر در Windows picture and fax viewer از طریق کدنویسی

//Open with the 'Windows picture and fax viewer':
System.Diagnostics.Process.Start(@"C:\Windows\syst  em32\rundll32.exe "
    , @"C:\Windows\system32\shimgvw.dll,ImageView_Fullsc  reen " + filename);

//Open with the 'Microsoft Paint':
System.Diagnostics.Process.Start(@"C:\Windows\syst  em32\MSPaint.exe "
    , filename);