我最近调试一个发邮件老系统，用.net2003编的。有些邮件中会产生一个形如：
<img src='localhost\FtbWebResource.axd?a=FreeTextBox%2c+Version%3d3.0.5000.2%2c+Culture%3dneutral%2c+PublicKeyToken%3dnull&r=FreeTextBoxControls.Resources.Images.Utility.spacer.gif&t=632716078800000000'> <img
<img src='localhost\FtbWebResource.axd?a=FreeTextBox%2c+Version%3d3.0.5000.2%2c+Culture%3dneutral%2c+PublicKeyToken%3dnull&r=FreeTextBoxControls.Resources.Images.Utility.spacer.gif&t=632716078800000000'> <img
