包含和相等的条件faling相等的字符串，加密和解密

Question

亲爱的stackoverflow助手 我只是在测试我的技能和学习方式，就像我遇到一些奇怪的东西时一样，在网上搜索但却无法做到。 找出问题所在。

我正在尝试构建一个将密钥存储在isostream中的加密程序。 第一次你可以在没有条件的情况下写密钥，但是之后你需要输入旧密钥

        (IsolatedStorageFileStream isoStream = new IsolatedStorageFileStream("key.txt", FileMode.CreateNew, isoStore))
            {
                using (StreamWriter writer = new StreamWriter(isoStream))
                {
                    //keycreation begin
                    Random rnd = new Random();
                    int random1 = rnd.Next(20000, 2000000); //number between 2000 and 2 million
                    stringrandom0 = random1.ToString();
                    char[] chars = "$%#@!*abcdefghijklmnopqrstuvwxyz1234567890?;:ABCDEFGHIJKLMNOPQRSTUVWXYZ^&".ToCharArray();
                    Random r = new Random();
                    int i = r.Next(chars.Length);
                    int q = r.Next(chars.Length);
                    int w = r.Next(chars.Length);
                    stringrandom1 = chars[i].ToString();
                    stringrandom2 = chars[q].ToString();
                    stringrandom3 = chars[w].ToString();
                    int random2 = rnd.Next(20000, 2000000); //number between 2000 and 2 million
                    stringrandom4 = random2.ToString();
                    key = stringrandom0 + stringrandom1 + stringrandom2 + stringrandom3 + stringrandom4;
                    textBox2.Text = "Creation & Encryption succesful finished your key = " + key + " do not lose this key!";
                    //key will look like this: letters, numbers, letters
                    //key creation end

                    writer.WriteLine(key);

                    File.Create(@"C:\Users\Legion\Desktop\encryption\text\" + fileName1).Close();
                    //Console.WriteLine("You have written to the file.");
                }
            }

所以它给了我一把钥匙：当事情没有成功时我会让它显示在文本框中以确定。我这样接受了。

      IsolatedStorageFile isoStore = IsolatedStorageFile.GetStore(IsolatedStorageScope.User | IsolatedStorageScope.Assembly, null, null);
        using (IsolatedStorageFileStream isoStream = new IsolatedStorageFileStream("key.txt", FileMode.Open, isoStore))
        {
            using (StreamReader reader = new StreamReader(isoStream))
            {
                keyentered = textBox4.Text;
                checkkey = (reader.ReadToEnd());
                textBox1.Text = checkkey;
                textBox3.Text = keyentered;
            }
        }

你可以看到我输入的代码设置为keyenter，我输入了：156216 * ek316677。

Checkkey读取书面文件，然后检查，我把它放到文本框中，然后显示:(完全没有空格）156216 * ek316677。

比较 156216 * ek316677。 156216 * ek316677。

所以这是支票代码

if (isoStore.FileExists("key.txt"))
        {
             using (IsolatedStorageFileStream isoStream = new IsolatedStorageFileStream("key.txt", FileMode.Open, isoStore))
            {
                if (keyentered.Contains(checkkey) || checkkey == keyentered)
                {
                    using (StreamWriter writer = new StreamWriter(isoStream))
                    {
                        //keycreation begin
                        Random rnd = new Random();
                        int random1 = rnd.Next(20000, 2000000); //number between 2000 and 2 million
                        stringrandom0 = random1.ToString();
                        char[] chars = "$%#@!*abcdefghijklmnopqrstuvwxyz1234567890?;:ABCDEFGHIJKLMNOPQRSTUVWXYZ^&".ToCharArray();
                        Random r = new Random();
                        int i = r.Next(chars.Length);
                        int q = r.Next(chars.Length);
                        int w = r.Next(chars.Length);
                        stringrandom1 = chars[i].ToString();
                        stringrandom2 = chars[q].ToString();
                        stringrandom3 = chars[w].ToString();
                        int random2 = rnd.Next(20000, 2000000); //number between 2000 and 2 million
                        stringrandom4 = random2.ToString();
                        key = stringrandom0 + stringrandom1 + stringrandom2 + stringrandom3 + stringrandom4;
                        textBox2.Text = "Creation & Encryption succesful finished your key = " + key + " do not lose this key!";
                        //key will look like this: letters, numbers, letters
                        //key creation end

                        writer.WriteLine(key);

                        File.Create(@"C:\Users\Legion\Desktop\encryption\text\" + fileName1).Close();
                        //Console.WriteLine("You have written to the file.");
                    }
                }
                else
                {
                    textBox2.Text = "invalid key entered!";
                }
            }
        }

问题是它一直说无效键输入，而它们完全相同，那么为什么if条件失败？ 我尝试了一个包含但它以完全相同的方式失败。

感谢您提供的任何帮助。 干杯的神灵，霍比和书呆子。 ：d