[Solved] Error while using Hardcoded String value in C#

Path ="D:\AAIGUILDMAY10.csv";

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class FrmImportFile : Form
    {
        public FrmImportFile()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string Path;
            Path ="D:\AAIGUILDMAY10.csv";
            dataGridView1.DataSource = ControlRules.ClsConnect.ReadCSV();
        }
    }
}