SQLBulkCopy in C#

1. protected void Button1_Click(object sender, EventArgs e)  
2. {  
3.     try  
4.     {  
5.         string cs = ConfigurationManager.ConnectionStrings["SchoolConnectionString"].ConnectionString;  
6.         using (SqlConnection sqlConn = new SqlConnection(cs))  
7.         {  
8.             DataSet ds = new DataSet();  
9.             ds.ReadXml(Server.MapPath("~/Data.xml"));  
10.             DataTable dtStudentMaster = ds.Tables["Student"];  
11.             sqlConn.Open();  
12.             using (SqlBulkCopy sqlbc = new SqlBulkCopy(sqlConn))  
13.             {  
14.                 sqlbc.DestinationTableName = "StudentMaster";  
15.                 sqlbc.ColumnMappings.Add("Name", "Name");  
16.                 sqlbc.ColumnMappings.Add("Phone", "Phone");  
17.                 sqlbc.ColumnMappings.Add("Address", "Address");  
18.                 sqlbc.ColumnMappings.Add("Class", "Class");  
19.                 sqlbc.WriteToServer(dtStudentMaster);  
20.                 Response.Write("Bulk data stored successfully");  
21.             }  
22.         }  
23.     }  
24.     catch (Exception ex)  
25.     {  
26.         throw ex;  
27.     }  
28. }