Ok i solved the problem:
1. string temp = Server.MapPath(Request.ApplicationPath);
2. string tempPath = Path.Combine(temp.Substring(0, (temp.Length - 21)), "IManageProject\\Images");
3. filePath = Path.Combine(tempPath, Path.GetFileName(fileName));
4. file.SaveAs(filePath);
I i just got the path to the root of the project using the code in line 1.
Then is used the substring on temp variable and got the path to the root and then finally combined it with the path to the folder i wanted.
and save the file.