Get Real XML Execution Plan

 Hi,
I want to access the real execution plan via my webapplication after I have executed an SQL statement. I know how to get the estimated execution plan:
1 cmd.CommandText = "SET SHOWPLAN_XML ON";
2 cmd.ExecuteNonQuery();
3
4 cmd.CommandText = myStatement;
5 SqlDataReader dataReader = cmd.ExecuteReader();
6
7 String plan = String.Empty;
8
9 while (dataReader.Read()) {
10 plan += dataReader.GetSqlString(0).ToString();
11 }
12
13 cmd.CommandText = "SET SHOWPLAN_XML OFF";
14 cmd.ExecuteNonQuery();

I want do compare the estimated costs with the real costs of the same statement. If I change code line 1 an 13 to "SET STATISTICS XML [ON|OFF]" the string "plan" will contain the result of the submitted SELECT statement, but I just need to get the plan and not the result itself.
 Thanks in Advance,
Dominik