is there a generic api/library for reading metadata of all known filetypes in c#?

I need to read & modify metadata of files uploaded in our server. Is there a generic api/library for reading Metadata in a Key-Value type of deal?

This means that it may be proprietary files such as .doc/docx, .xls/xlsx, etc. And free stuff开发者_JAVA百科 like .rtf, .txt, .jpg

Thanks for all the help

There's no library for reading the metadata of "all known filetypes" in any language, because it's pretty much impossible.

You may be able to find libraries capable of reading a particular format or family of closely-related formats, which is the most common solution and works in most situations.

For the formats you've listed, libraries do exist. JPG has some support built into C#, I think, through some of the System libraries. TXT is simple text, that's supported in most languages. RTF has some support, mainly through the RichTextBox control, I think. For the other two, I would look into Office's SDK or perhaps the Office development stuff for Visual Studio, those might have more information.

There is a program, TrID, that can identify file formats based on their data, which may be of some interest. It doesn't do proper metadata reading, but it is the closest thing to a universal file reader that exists (that I'm aware of).