Is there a way to apply a patch file into a repository by using this lib?

[yukozh]

Now I have a patch file like:

+++ xxx.cs
--- xxx.cs
@@ x,x x,x @@
+ xxxx
- xxxx
- xxxx
xxxx

I want to use libgit2sharp to apply this patch file to a repository.
How to do this?

[retroandchill]

I also want to know this, as I need a way to apply patches to a downloaded directory