查看操作系统安装的所有 ASP.NET 版本

 添加引用：AspNetMMCExt
添加名字空间：using Microsoft.Aspnet.Snapin;

AspNetManagementUtility aspnet = new AspNetManagementUtility();

string verList;
aspnet.AcquireVersionList(out verList, 0);

Console.WriteLine(verList);