public void ForceSaveSolution()
{
// Get solution service
IVsSolution solutionService = (IVsSolution)VsIdeTestHostContext.ServiceProvider.GetService(typeof(IVsSolution));
// Force-save the solution
solutionService.SaveSolutionElement((uint)__VSSLNSAVEOPTIONS.SLNSAVEOPT_ForceSave, null, 0);
}