StreamWriter中的特殊字符

我正在使用streamwriter将字符串写入流中。现在，当我访问流中的数据时，它会在内容的末尾添加"''0''0''0"个字符。我必须附加流内容，所以这会产生问题，因为我无法通过trim（）、remove（）或replace（）方法删除这些字符。

以下是我正在使用的代码：

写入：

using (MemoryMappedViewStream stream = mmf.CreateViewStream())
{
    using (StreamWriter writer = new StreamWriter(stream, System.Text.Encoding.Unicode))
    {
        try
        {
            string[] files = System.IO.Directory.GetFiles(folderName, "*.*", System.IO.SearchOption.AllDirectories);
            foreach (string str in files)
            {
                writer.WriteLine(str);
            }
            // writer.WriteLine(folderName);
        }
        catch (Exception ex)
        {
            Debug.WriteLine("Unable to write string. " + ex);
        }
        finally
        {
            mutex.ReleaseMutex();
            mutex.WaitOne();
        }
    }
}

阅读：

 StringBuilder sb = new StringBuilder();
            string str = @"D:'Other Files'Test_Folder'New Text Document.txt";
 using (var stream = mmf.CreateViewStream())
                {
                    System.IO.StreamReader reader = new System.IO.StreamReader(stream);
                    sb.Append(reader.ReadToEnd());
                    sb.ToString().Trim(''0');
                    sb.Append("'n" + str);
                }

我该如何防止这种情况发生？

[更新]写入

// Lock
            bool mutexCreated;
            Mutex mutex = new Mutex(true, fileName, out mutexCreated);
            if (!mutexCreated)
                mutex = new Mutex(true);
            try
            {
                using (MemoryMappedViewStream stream = mmf.CreateViewStream())
                {
                    using (BinaryWriter writer = new BinaryWriter(stream))
                    {
                        try
                        {
                            string[] files = System.IO.Directory.GetFiles(folderName, "*.*", System.IO.SearchOption.AllDirectories);
                            foreach (string str in files)
                            {
                                writer.Write(str);
                            }
                            writer.Flush();
                        }
                        catch (Exception ex)
                        {
                            Debug.WriteLine("Unable to write string. " + ex);
                        }
                        finally
                        {
                            mutex.ReleaseMutex();
                            mutex.WaitOne();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Unable to monitor memory file. " + ex);
            }

读取

StringBuilder sb = new StringBuilder();
            string str = @"D:'Other Files'Test_Folder'New Text Document.txt";
            try
            {
                using (var stream = mmf.CreateViewStream())
                {
                    System.IO.BinaryReader reader = new System.IO.BinaryReader(stream);
                    sb.Append(reader.ReadString());
                    sb.Append("'n" + str);
                }
                using (var stream = mmf.CreateViewStream())
                {
                    System.IO.BinaryWriter writer = new System.IO.BinaryWriter(stream);
                    writer.Write(sb.ToString());
                }
                using (var stream = mmf.CreateViewStream())
                {
                    System.IO.BinaryReader reader = new System.IO.BinaryReader(stream);
                    Console.WriteLine(reader.ReadString());
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine("Unable to monitor memory file. " + ex);
            }