How do I add new row below selected row in datagridview when user click or mouse over, in C#?

using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace TestForm1
{
    public partial class Form1 : Form
    {
        /// <summary>
        /// The binding list reference.
        /// </summary>
        private BindingList<MyClass> masterBindingList;

        public Form1()
        {
            InitializeComponent();
            this.Init();
        }

        private void Init()
        {
            this.masterBindingList = new BindingList<MyClass>();
            this.dataGridViewMaster.DataSource = this.masterBindingList;
        }

        private void ButtonAddRowClick(object sender, EventArgs e)
        {
            var rowIndex = this.dataGridViewMaster.RowCount;
            this.AddRow(rowIndex);
            this.ScrollToRow(rowIndex);
        }

        /// <summary>
        /// Add new row via the BindingList.
        /// </summary>
        private void AddRow(int rowIndex)
        {
            this.masterBindingList.Add(new MyClass { Title = "Row " + rowIndex.ToString() });
        }

        private void ScrollToRow(int rowIndex)
        {
            this.dataGridViewMaster.ClearSelection();
            this.dataGridViewMaster.FirstDisplayedScrollingRowIndex = rowIndex;
            this.dataGridViewMaster.Focus();
        }
        /// <summary>
        /// Simple class with one string.
        /// </summary>
        public class MyClass
        {
            public string Title { get; set; }
        }
    }
}