How to use an if-else statement in an array list? C# -

code:

arraylist myname = new arraylist() { "xx", "y", "z" }; random rnd = new random(); int r = rnd.next(myname.count); console.writeline(myname[r]); string x = console.readline();  if(x == "xx") {      console.writeline("welcome xx");  }  else if () {}....  console.readline(); 

i trying generate random strings array list doing successfully. want display message when each string appears , used if-else statement this. however, if-else statement not working. point out error in code?

        arraylist myname = new arraylist() { "xx", "y", "z" };         random rnd = new random();         int r = rnd.next(myname.count);         console.writeline(myname[r]);           if (myname[r].equals("xx"))         {             console.writeline("welcome xx");         }         else if (myname[r].equals("y"))         {             console.writeline("welcome y");         }         else if (myname[r].equals("z"))         {             console.writeline("welcome z");         }