ImageResizer 是开源的项目，实现了以 QueryString （n1=v1&n1=v1）传参以控制图片尺寸、质量等。
示例：
using ImageResizer;
//Converts a jpeg into a png
ImageBuilder.Current.Build("~/images/photo.jpg","~/images/photo.png", new ResizeSettings("format=png"));//源地址 目的地址 转换参数
//Crops to a square (in place)
ImageBuilder.Current.Build("~/images/photo.jpg","~/images/photo.jpg", new ResizeSettings("width=100&height=200&crop=auto"));