如何使材料设计在Xamarin Andriod中填充文本字段

<android.support.design.widget.TextInputLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter text" />

</android.support.design.widget.TextInputLayout>

TextInputLayout textInputLayout = FindViewById<TextInputLayout>(Resource.Id.textInputLayout);
EditText editText = FindViewById<EditText>(Resource.Id.editText);
textInputLayout.Hint = "Enter text";

if (string.IsNullOrEmpty(editText.Text))
{
    textInputLayout.Error = "Text cannot be empty";
}
else
{
    textInputLayout.Error = null;
}