int newProjectId = 0; 
// [1] Projects Copy
using (var ctx = new DashboardContext())
{
    var tempProject = ctx.Projects.AsNoTracking().Where(p => p.Id == ProjectId).SingleOrDefault();

    tempProject.Id = 0;

    ctx.Projects.Add(tempProject);
    ctx.SaveChanges();

    newProjectId = tempProject.Id; 
}