How to set first next previous last in listview?

Disable buttons till listview is loaded with data
Set listview multiselect to false

    private void bttnFirst_Click(object sender, EventArgs e)
        {
            if (listView1.Items.Count > 0)
            {

                listView1.Focus();
                listView1.Items[0].Selected = true;
                listView1.Items[0].Focused = true;
            }
        }

        private void bttnNext_Click(object sender, EventArgs e)
        {          
                int index = listView1.SelectedIndices[0];
                index += 1;
                if (index < listView1.Items.Count-1)
                {
                    listView1.Focus();
                    listView1.Items[index].Selected = true;
                    listView1.Items[index].Focused = true;
                }
                else
                {
                    listView1.Focus();
                    listView1.Items[listView1.Items.Count - 1].Selected = true;
                    listView1.Items[listView1.Items.Count - 1].Focused = true;

                }
          
        }

        private void bttnPrevious_Click(object sender, EventArgs e)
        {
           
                int index = listView1.SelectedIndices[0];
                index -= 1;
                if (index >= 0)
                {
                    listView1.Focus();
                    listView1.Items[index].Selected = true;
                    listView1.Items[index].Focused = true;
                }
                else
                {
                    listView1.Focus();
                    listView1.Items[0].Selected = true;
                    listView1.Items[0].Focused = true;
                }
             
                                    
        }

        private void bttnLast_Click(object sender, EventArgs e)
        {
            if (listView1.Items.Count-1 > 0)
            {

                int i = listView1.Items.Count;
                listView1.Focus();
                listView1.Items[i - 1].Selected = true;
                listView1.Items[i - 1].Focused = true;
            }
        }