命名空间：System
1、构造函数(可拼接)
Uri(string)
Uri address = new Uri("http://localhost:XXX/");
Uri(uri,string)
Uri address = new Uri(address, "/api/products");
Uri(uri,uri)
2、属性
Uri baseUri = new Uri("http://www.contoso.com/");
Uri myUri = new Uri(baseUri, "catalog/shownew.htm?date=today");
myUri.AbsoluteUri=“http://www.contoso.com:8080/catalog/shownew.htm?date=today”;
myUri.AbsolutePath="/catalog/shownew.htm";
myUri.Authority="www.contoso.com:8080";
原文：https://www.cnblogs.com/chendameinv/p/9517279.html