Error 2014 - Commands out of sync (no replies)

I am using C#/.NET connector.

With several stored procedure call, i meet an error message #2014 "Commands out of sync". Dev pages says about this:

mysql_use_result() (http://dev.mysql.com/doc/refman/5.0/en/mysql-use-result.html),
mysql_free_result() (http://dev.mysql.com/doc/refman/5.0/en/mysql-free-result.html)

I found these APIs only in C lib? I think, .Net connector should be call these use() / free() functions automatically - for example on .ExecuteReader() and MySql.Data.MySqlClient.MySqlDataReader.Close().

How to call these from C# application ?

Any tipps will be great. Thx.