1.新的索引引擎更快的执行效率
   下面这段代码在2003中需要157秒，在2005中只要11秒就可以完成：

DataSet ds = new DataSet();

ds.Tables.Add("BigTable");
            ds.Tables[0].Columns.Add("ID", Type.GetType("System.Int32"));
            ds.Tables[0].Columns["ID"].Unique = true;
            ds.Tables[0].Columns.Add("Value", Type.GetType("System.Int32"));

Cursor.Current = Cursors.WaitCursor;

DateTime datBegin = DateTime.Now;

Random rand = new Random();
            int i, intValue;
            DataRow dr;

for (i = 1; i <= 500000; i++)
            {
                try
                {
                    intValue = rand.Next();

dr = ds.Tables[0].NewRow();

dr["ID"] = intValue;
                    dr["Value"] = intValue;

ds.Tables[0].Rows.Add(dr);
                }
                catch { }
            }

Cursor.Current = Cursors.Default;

MessageBox.Show("Elapsed Time: " + (DateTime.Now - datBegin).Seconds.ToString());
            MessageBox.Show("count = " + ds.Tables[0].Rows.Count.ToString());
2.Dataset可以序列化为二进制文件
 string connstr = "server=(local);database=northwind;integrated security=true;async=true";

DataSet ds = new DataSet();
            SqlDataAdapter dadpt = new SqlDataAdapter("select * from [order details]", connstr);
            dadpt.Fill(ds);

BinaryFormatter bf = new BinaryFormatter();
            FileStream fs = new FileStream(@"c:\xml1.txt",FileMode.OpenOrCreate);

ds.RemotingFormat = SerializationFormat.Binary;

bf.Serialize(fs,ds);     3.更独立的Datatable
  DataTable Write XML  string connstr = "server=(local);database=northwind;integrated security=true;async=true";
            SqlDataAdapter dadpt = new SqlDataAdapter("select * from [order details]", connstr);
            DataTable dt = new DataTable("Customer");
            dadpt.Fill(dt);

dt.WriteXml(@"c:\DataTable.xml",true);
            dt.WriteXmlSchema(@"c:\DataTableSchema.xml");   DataTable Read XML
 StreamReader sr = new StreamReader(@"C:\DataTableSchema.xml");

DataTable dt = new DataTable();
            dt.ReadXmlSchema(sr);

dt.ReadXml(new StreamReader(@"c:\dataTable.xml"));

this.dataGridView1.DataSource = dt;    DataTable Merge
 string connstr = "server=(local);database=northwind;integrated security=true;async=true";
            SqlDataAdapter dadpt = new SqlDataAdapter("select * from customers", connstr);
            DataTable dt = new DataTable("Customer");
            dadpt.Fill(dt);

SqlDataAdapter dadpt1 = new SqlDataAdapter("select * from customers", connstr);
            DataTable dt1 = new DataTable("Customer1");
            dadpt1.Fill(dt1);

dt.Merge(dt1);

this.dataGridView1.DataSource = dt;  DataTable Load DataReader
 string connstr = "server=(local);database=northwind;integrated security=true;async=true";
            SqlConnection conn = new SqlConnection(connstr);
            conn.Open();
            SqlCommand cmd = new SqlCommand("select * from [order details]", conn);
            SqlDataReader dr = cmd.ExecuteReader();

DataTable dt = new DataTable("Customer");
            dt.Load(dr);

this.dataGridView1.DataSource = dt;