Change Scene after time?

I have been trying to change the scene after a certain by using yield waitforseconds, and application load level to get the job done. But it gives this error " It is not possible to invoke an expression of type ‘int’.

function Start () {
Application.loadedLevel (“Main Menu”);
yield WaitForSeconds (5);

}

You are using the wrong method and in a wrong way. First it is

 Application.LoadLevel("name");

Second you want to wait and do while now you are doing and wait.

 function Start(){
        yield WaitForSeconds(5);
        Application.LoadLevel("name");
 }

How can I do this in C#?