main.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ListView
        android:id="@+id/listView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
</LinearLayout>

row.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/left"
        android:layout_height="wrap_content"
        android:layout_width="0px"
        android:layout_weight="1"
        android:text="left" />
    <TextView
        android:id="@+id/right"
        android:layout_height="wrap_content"
        android:layout_width="0px"
        android:layout_weight="1"
        android:text="right" />
</LinearLayout>

SuperAwesomeActivity.cs

[Activity(Label = "Pseudo MultiColumn", MainLauncher = true, Icon = "@drawable/icon")]
public class SuperAwesomeActivity : Activity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.main);

        var data = new List<SuperAwesomeModel>
        {
            new SuperAwesomeModel {
                Left = "herp",
                Right = "derp"
            },

            new SuperAwesomeModel {
                Left = "foo",
                Right = "bar"
            },

            new SuperAwesomeModel {
                Left = "baz",
                Right = "qux"
            },

            new SuperAwesomeModel {
                Left = "quux",
                Right = "corge"
            },

            new SuperAwesomeModel {
                Left = "grault",
                Right = "garply"
            },

            new SuperAwesomeModel {
                Left = "waldo",
                Right = "fred"
            },
        };

        var listView = FindViewById<ListView>(Resource.Id.listView);
        listView.Adapter = new SuperAwesomeModelAdapter(this, data);
    }
}

SuperAwesomeModel.cs

public class SuperAwesomeModel
{
    public string Left { get; set; }
    public string Right { get; set; }
}

SuperAwesomeModelAdapter.cs

public class SuperAwesomeModelAdapter : BaseAdapter<SuperAwesomeModel>
{
    private readonly IList<SuperAwesomeModel> _items;
    private readonly Context _context;

    public SuperAwesomeModelAdapter(Context context, IList<SuperAwesomeModel> items)
    {
        _items = items;
        _context = context;
    }

    public override long GetItemId(int position)
    {
        return position;
    }

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
        var item = _items[position];
        var view = convertView;

        if (view == null)
        {
            var inflater = LayoutInflater.FromContext(_context);
            view = inflater.Inflate(Resource.Layout.row, parent, false);
        }

        view.FindViewById<TextView>(Resource.Id.left).Text = item.Left;
        view.FindViewById<TextView>(Resource.Id.right).Text = item.Right;

        return view;
    }

    public override int Count
    {
        get { return _items.Count; }
    }

    public override SuperAwesomeModel this[int position]
    {
        get { return _items[position]; }
    }
}

could you please explain me how to fill database data like this.