Calling stored procedure ignoring output parameters

I need to call MySql procedure as a plain text. Procedure has output parameter.
I'm not interested in returned data. What do I need to pass as output parameter to ignore it?

PS:

I know that using of SqlParameters is good and safe, but it is not my case.

From stackoverflow

• Is this what you are looking for?

  SqlConnection mySqlConnection = ConnectDB();
  SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
  mySqlCommand.CommandText =
     @" 
        SQL QUERY HERE
     ";
  mySqlConnection.Open();
  mySqlCommand.ExecuteNonQuery();
  mySqlConnection.Close();
  

  Orsol : Not exact. I need to call "MyStoredProcedure @outputParam"