未能找到类型或命名空间名称“EvenQtArgs”错误，大侠帮分析下吧

Question

错误 1 未能找到类型或命名空间名称“EvenQtArgs”(是否缺少 using 指令或程序集引用?) c:\documents and settings\administrator\my documents\visual studio 2010\Projects\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 25using 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 Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void textBox1_TextChanged(object sender, EventArgs e)
        {        }        private void button1_Click(object sender, EvenQtArgs e)
        {
            MessageBox.Show("朋友你好！", "hello");        }
        private void button2_Click(object sender, EventArgs e)
        {
            OpenFileDialog fdlg = new OpenFileDialog();            fdlg.Title = "选择图片";            fdlg.InitialDirectory="C:\\";        }        private void button3_Click(object sender, EventArgs e)
        {        }        private void pictureBox1_Click(object sender, EventArgs e)
        {        }
    }
}

Answer 1

 private void button1_Click(object sender, EvenQtArgs e)
  {
  MessageBox.Show("朋友你好！", "hello");  }
你乱打了个Q进去了，红字改回EventArgs