<p>I wonder if it's possible to save all files in a Visual Studio 2008 project into a specific character encoding. I got a solution with mixed encodings and I want to make them all the same (UTF-8 with signature).</p>

<p>I know how to save single files, but how about all files in a project?</p>

I'm only offering this suggestion in case there's no way to automatically do this in Visual Studio (I'm not even sure this would work):
Create a class in your project named
足の不自由なハッキング
(or some other unicode text that will force Visual Studio to encode as UTF-8).
Add "using MyProject.
足の不自由なハッキング
;" to the top of each file.  You should be able to do it on everything by doing a global replace of "using System.Text;" with "using System.Text;using MyProject.
足の不自由なハッキング
;".
Save everything.  You may get a long string of "Do you want to save X.cs using UTF-8?" messages or something.