EF中更新指定字段

Info.Set<T>().Attach(Entity);
var SetEntry = ((System.Data.Entity.Infrastructure.IObjectContextAdapter)Info).ObjectContext.ObjectStateManager.GetObjectStateEntry(Entity);
//Info.Entry<T>(Entity).State = EntityState.Modified;
foreach (var t in fileds)
SetEntry.SetModifiedProperty(t);

return Info.SaveChanges() > 0;