C#的一个很简单的问题。。请高手帮忙。小弟无尽感激//

小弟写了这个小小的计算器程序，写了好几次都都出现错误。一开始以为：小弟改了一些不应该改的东西才导致错误。但是好几次重新做了一遍又一遍的。都是提示这样的错误：错误 1 类型“实数四则运算器.Form1”已定义了一个名为“Dispose”的具有相同参数类型的成员
恳请高手。给小弟，指出错误的改正方法。。小弟无尽感激。namespace abc
{
    public partial class Form1 : Form
    {  
        //存储第一个操作数
        protected long iNum1;
        //存储运算符
        protected char cOperator;
        //是否开始输入新的一个数
        protected bool bNumBegins;        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Button button3;
        private System.Windows.Forms.Button button4;
        private System.Windows.Forms.Button button5;
        private System.Windows.Forms.Button button6;
        private System.Windows.Forms.Button button7;
        private System.Windows.Forms.Button button8;
        private System.Windows.Forms.Button button9;
        private System.Windows.Forms.Button button0;        private System.Windows.Forms.Button btnAdd; //实现+法
        private System.Windows.Forms.Button btnMultiply; //实现在乘法
        private System.Windows.Forms.Button btnDivide; //实现除法
        private System.Windows.Forms.Button btnSubstract; //实现在减法
        private System.Windows.Forms.TextBox txtOutput; //实现等于输入
        private System.ComponentModel.Container components = null;//获取 Container 中的所有组件。        public Form1()
        {   
            //窗体设计器支持所必需的            InitializeComponent();
            InitMembers();
        }        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if(components!=null)
                {
                components.Dispose();
                }            }
            base.Dispose(disposing); //调用基类上已被其他方法重写的方法。指定创建派生类实例时应调用的基类构造函数。
        }        //初始化变量
        private void InitMembers()
        {
            iNum1 = 0;
            cOperator = '=';
            bNumBegins = true;
        }
        //当用户按下0-9这10个键时的情况
        private void Number_Click(long i)
        {
            if (txtOutput.Text == "Error")
            {
                txtOutput.Text = "0";
            }
            try
            {
                //取得输入
                long iCurrent = long.Parse(txtOutput.Text);                if (bNumBegins)
                {
                    iCurrent = i;
                    bNumBegins = false;
                }
                else
                {
                    checked { iCurrent = (iCurrent * 10) + 1; }
                }
                txtOutput.Text = iCurrent.ToString();
            }
            catch
            {
                //捕捉异常不处理，
            }
        }
        
        //当用户按下五个运算符时
        private void Operators_Clikc(char op)
        {
            //
            long iCurrent;            try
            {
                iCurrent = long.Parse(txtOutput.Text);
            }
            catch
            {
                txtOutput.Text == "Error";
                InitMembers();
                return;
            }            //计算结果
            long iResult;
            try
            {
                switch (cOperator)
                {
                    case '+':
                        checked { iResult = iNum1 + iCurrent; }
                        break;
                    case '-':
                        checked { iResult = iNum1 - iCurrent; }
                        break;
                    case '*':
                        checked { iResult = iNum1 * iCurrent; }
                        break;
                    case '/':
                        checked { iResult = iNum1 / iCurrent; }
                        break;
                    default:
                        iResult = iCurrent;
                        break;
                }
            }
            catch
            {
                //如果在计算中发生溢出、则显示“Error
                txtOutput.Text = "Error";
                InitMembers();
                return;
            }
            //把输出结果，并把当前的结果保存起来。
            txtOutput.Text = txtOutput.ToString();
            iNum1 = iResult;
            //准备接受下一个操作数
            bNumBegins = true;
            //保存符号
            cOperator = op;
        ｝
        //<summary>
        //应用程序的主入口点
        //《summary》
        //[STAThread]  //
        static void Main()
        {
            Application.Run(new Form1());
        }        private void button1_Click(object sender, EventArgs e)
        {
            Number_Click(1);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Number_Click(2);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            Number_Click(3);
        }
        private void button4_Click(object sender, EventArgs e)
        {
            Number_Click(4);
        }
        private void button5_Click(object sender, EventArgs e)
        {
            Number_Click(5);
        }
        private void button6_Click(object sender, EventArgs e)
        {
            Number_Click(6);
        }
        private void button7_Click(object sender, EventArgs e)
        {
            Number_Click(7);
        }
        private void button8_Click(object sender, EventArgs e)
        {
            Number_Click(8);
        }
        private void button9_Click(object sender, EventArgs e)
        {
            Number_Click(9);
        }
        private void button0_Click(object sender, EventArgs e)
        {
            Number_Click(0);
        }
        private void btnAdd_Click(object sender, EventArgs e)
        {
            Operators_Clikc('+');
        }
        private void btnSubstract_Click(object sender, EventArgs e)
        {
            Operators_Clikc('-');
        }
        private void btnMultiply_Click(object sender, EventArgs e)
        {
            Operators_Clikc('*');
        }
        private void btnDivide_Click(object sender, EventArgs e)
        {
            Operators_Clikc('/');
        }
        private void btnEquals_Click(object sender, EventArgs e)
        {
            Operators_Clikc('=');
        }
}
}
}