Default Entry point for user code in vsSolutionBuildEvent - http://vssbe.r-eg.net/doc/Modes/CSharp/

act.cs

using ICommand = net.r_eg.vsSBE.Actions.ICommand;
using ISolutionEvent = net.r_eg.vsSBE.Events.ISolutionEvent;

namespace vsSolutionBuildEvent
{
    public class CSharpMode
    {
        public static int Init(ICommand cmd, ISolutionEvent evt)
        {
            return 0;
        }
    }
}