How to avoid OnCreate method execution when activity has been opened previously (Xamarin.Android)?

I have two activities FirstActivity and SecondActivity. When I am in FirstActivty I call the SecondActivity like that:

var secondActivity = new Intent(this, typeof(SecondActivity));
secondActivity.PutExtra("someExtra", someExtra);
StartActivity(secondActivity);
Finish();

In SecondActivity I call the FirstActivity in OnBackPressed method:

public override void OnBackPressed()
{
    StartActivity(typeof(FirstActivty));
    Finish();
}

I looked at answers regarding that question for Android(Java). The answers were that in order to avoid OnCreate method to be executed in FirstActivity when the activity has been already created, I don't have to destroy FirstActivity after I open SecondActivity, I have to remove Finish() after StartActivity(secondActivity); line. I removed it but OnCreate method still gets executed when I go back from SecondActivity. Does this solution work only in Android(Java) ,and if yes, what is the solution for Xamarin.Android ?