C# 4.0命名参数和可选参数

public partialclass NamedAndOptionalArguments : System.Web.UI.Page
     {
 protectedvoid Page_Load(object sender, EventArgs  e)
         {
             Write("hello");
             Write("hello","webabcd");
             Write("hello", p3:false, p2:"webabcd");
         }
 
 privatevoid Write(string p1,string  p2 =  "p2",bool p3= true)
         {
             Response.Write(string.Format("p1:{0}; p2:{1}; p3:{2}",  p1, p2, p3.ToString()));
             Response.Write("<br />");
         }
     }