The Default View Only Populate After a Search has been done and Not Automatically Populate the View at Startup

Here ListView Data Will Not be Populated on Activated , Data Will be Populated when
You search anything

namespace FilterListView.Module
{
public partial class ViewController1 : ViewController
{
public ViewController1()
{
InitializeComponent();
RegisterActions(components);
}
protected override void OnActivated()
{
base.OnActivated();
if (View is ListView && View.ObjectTypeInfo.Type == typeof(ContactA))
{
ListView lv = (ListView)View;
lv.CollectionSource.CollectionChanged += new EventHandler(CollectionSource_CollectionChanged); }
}

void CollectionSource_CollectionChanged(object sender, EventArgs e)
{
ListView listView = (ListView)View ;
if (listView.CollectionSource.Collection.Count > 0)
{
if (!listView.CollectionSource.Criteria.ContainsKey("EmptyCollectionCriteria")) {
listView.CollectionSource.Criteria.Add("EmptyCollectionCriteria", CollectionSource.EmptyCollectionCriteria);
}
listView.CollectionSource.Criteria.Changed += new EventHandler(Criteria_Changed);
}
}
void Criteria_Changed(object sender, EventArgs e)
{
ListView listView = (ListView)View;
listView.CollectionSource.Criteria.Remove("EmptyCollectionCriteria");
}
}
}