Problem with C#

I have the following problem with the code :
Error      1      'excel_1_8_tttt.Form1.Dispose(bool)': no suitable method found to override      c:\users\user\documents\visual studio 2013\Projects\excel_1_8_tttt\excel_1_8_tttt\Form1.Designer.cs      14      33      excel_1_8_tttt


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;

//namespace excel_1_8_tttt


namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Excel.Application xlApp;
            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            object misValue = System.Reflection.Missing.Value;

            xlApp = new Excel.Application();
            xlWorkBook = xlApp.Workbooks.Open("csharp.net-informations.xls", 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

            MessageBox.Show(xlWorkSheet.get_Range("A1", "A1").Value2.ToString());

            xlWorkBook.Close(true, misValue, misValue);
            xlApp.Quit();

            releaseObject(xlWorkSheet);
            releaseObject(xlWorkBook);
            releaseObject(xlApp);
        }

        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                MessageBox.Show("Unable to release the Object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }
    }
}

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Can anyone advice me how to fix this problem ?
GasAsked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
you are implementing the form class, which requires you to expliciteky overide the dispose method.it can be done by simply calling the base.dispose methid, but it must be done.
see this blog:
https://blogs.msdn.microsoft.com/ploeh/2006/08/10/how-to-dispose-members-from-forms/
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C#

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