For example, there are three C# project in my solution, and I want to synchronize their version. What I have to do now is to manually edit "AssemblyInfo.cs" file in every project. If there were a way to "include" a C# file, put information common to all projects in that file, it would be much easier to maintain it.
Thanks!

Could I "inlcude" a C# source file?
Nikhil Agarwal
TonyL82
Chundaman
pelazem
Hakan at devBiz
Project > Add New Item... Code File
Write what you need to write in there and change the output type for that file to Class Library. Once it has compiled browse for the new .dll file in your solutions save file in the Add Reference dialog box. And once you have added it into your references all you need to do is go into you 'AssemblyInfo.cs' file and add the file to your using directives i.e.:
using myCodeFile;
I'm not really sure if this is what you wanted, if not please explain so I can try to help you.