求大师帮忙分析代码

 string sLine = "";

            if (File.Exists(Application.StartupPath + "\\Password.ini"))

            {

                StreamReader aFile = new StreamReader(Application.StartupPath + "\\Password.ini");

                if (sLine != null)

                {

                    sLine = aFile.ReadLine();

                }

                else sLine = "";

                aFile.Close();

            }

            else

            {

                FileStream aFile1 = new FileStream(Application.StartupPath + "\\Password.ini", FileMode.OpenOrCreate);

                StreamWriter MyWriter1 = new StreamWriter(aFile1);

                MyWriter1.Write("");

                aFile1.Close();

            }



            if (textBox1.Text == sLine)

            {

                this.Close();

                Application.Exit();

            }

            else

            {

                label1.Text = "输入密码不正确，请重新输入。";

                textBox1.Clear();

                textBox1.Focus();

            }

为什么当“Application.StartupPath + "\\Password.ini"”中的ini文件什么也米有时候，就验证不了。。。。。。


怎么实现即使Password.ini为空 ，也可以验证。

谢谢