从C＃中的文件中收集二进制数据并编辑或添加数据，而无需再次写入整个文件

I know this sounds kind of confusing. but i was wondering if there is a way to maintain the structure of the file and editing it even if it's adding data at some part of the file or editing a value from a certain position.I know this sounds kind of confusing. but i was