DataRow dr = hRDataSet.Tables["emp"].Rows.Find(textBox3.Text);             //DataRow dr = hRDataSet.Tables["emp"].Select("id="+textBox3.Text)[0];             dr.BeginEdit();             dr["name"] = textBox1.Text;             dr.EndEdit();             SqlCommandBuilder cmd=new SqlCommandBuilder(empTableAdapter);             empTableAdapter.Update(hRDataSet);             this.empTableAdapter.Fill(this.hRDataSet.emp);

            DataSet ds = new DataSet();             using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["db"].ConnectionString))             {                 String sql = "select id,name,age from emp";                 SqlDataAdapter adp = new SqlDataAdapter(sql, conn);                 adp.Fill(ds);                 DataRow dr=ds.Tables[0].NewRow();                 dr["name"]=txtName.Text;                 dr["age"] = Convert.ToInt32(txtAge.Text);                 SqlCommandBuilder cmd=new SqlCommandBuilder(adp);                 ds.Tables[0].Rows.Add(dr);                 adp.Update(ds);             }

            DataRow dr = hRDataSet.Tables["emp"].Rows.Find(textBox3.Text);             //DataRow dr = hRDataSet.Tables["emp"].Select("id="+textBox3.Text)[0];            dr.Delete();             SqlCommandBuilder cmd=new SqlCommandBuilder(empTableAdapter);             empTableAdapter.Update(hRDataSet);             this.empTableAdapter.Fill(this.hRDataSet.emp);