缓存Linq的mappingSource，提高Linq To SQL的性能,（20%的性能都不至哟）

关键对象AttributeMappingSource

        [TestMethod]
        public void TestMethod1()
        {
            AttributeMappingSource source = new AttributeMappingSource();
            for (int i = 0; i < 10000; i++)
            {

                //AttributeMappingSource source = new AttributeMappingSource();--》去掉注释试试性能

                HRDataContext context = new HRDataContext(connString, source);
                var emp = context.GetTable<HR_Employee>().Where(p => p.EmployeeId == 10);

            }
        }

　　

只要static一下AttributeMappingSource,每次使用就可以了