您可以加载/保存到MemoryStream以解决读取文件末尾的问题.看起来可能像这样:

You could load/save to a MemoryStream to solve your issue with reading to the end of the file. It could look like this:

• 将文件加载到内存中
• 将该文件的一部分(即richtextbox的内容)加载到MemoryStream中
• 从该MemoryStream加载richtextbox内容

还是您想知道如何创建和解析文件以包含标题，内容和任何其他字段的不同部分?

Or are you wanting to know how you'd create and parse a file to contain different sections for the title, and the contents, and any other fields ?