Get Dynamic the web.config file path

 Hi,
I would like to get dynamic the path of web.config file in my solution. I have now this code:

ApplicationLogManager.Initialize(@"E:\TraxFlex\Code\StorageSystemWebService\StorageSystemWebService\web.config");
Is there some method or property to get the current root path of my solution?
 
solution root path: E:\TraxFlex\Code\StorageSystemWebService
project root path: E:\TraxFlex\Code\StorageSystemWebService\StorageSystemWebService
...