Toast.txt

  //simple
  //simple
             Toast.MakeText(this,"hi",  ToastLength.Short).Show();
            //complex
            Toast t = new Toast(this);
           View view = LayoutInflater.Inflate(Resource.Layout.ticket_news, null);
            TextView tv = view.FindViewById<TextView>(Resource.Id.Text1);
            tv.Text = "hi";
            t.View = view;
            t.Duration = ToastLength.Short;
            t.Show();

/// view

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/whilebackground"
    android:padding="8dp">
    <LinearLayout
        android:id="@+id/Text"
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="10dip">
        <TextView
            android:id="@+id/Text1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#FF7F3300"
            android:textSize="20dip"
            android:textStyle="italic" /> 
    </LinearLayout> 
</RelativeLayout>