ef 事务

using (var context = new FcityDB２Entities())
{
using (var trasaction = context.Database.BeginTransaction())
{
try
{
TestEF t = new TestEF();
t.username = "conan";
t.age = 101;
t.birthday = System.DateTime.Now;
context.Set<TestEF>().Add(t);
context.SaveChanges();

TestEF t2 = new TestEF();
t2.username = "conan";
t2.age = 101;
t2.birthday = System.DateTime.Now;
context.Set<TestEF>().Add(t2);
context.SaveChanges();
trasaction.Commit();
}
catch
{
trasaction.Rollback();
}
}
}