How to increase the toasted message duration greater than Long in xamarin

Question

I am developing a xamarin app and I want to show the toasted messages for 50 seconds.How to achieve this in xamarin forms. Kindly help me

Here is my code

Toast toast = Toast.MakeText(Android.App.Application.Context, content, ToastLength.Long);

        if (toast != null)
        {
            toast.SetGravity(GravityFlags.Bottom, 0, 100);
            toast.Show();
        }