asp.net Async call using BeginExecuteNonQuery db not firing

my code fires off ExecuteNonQueryAsyc. In debug I see it hit command.BeginExecuteNonQuery(new AsyncCallback(AsyncCommandCompletionCallback), command); line but the sp is not really being fired off that gets called. what am I doing wrong?

public static void ExecuteNonQueryAsyc(string procedureName, IList<SqlParameter> parameters)
{
    using (SqlConnection connection = new SqlConnection(Config.GetDbConnection() + ";Async=true;"))
    {
        S开发者_如何学编程qlCommand command = connection.CreateCommand();

        command.CommandText = procedureName;
        command.CommandType = CommandType.StoredProcedure;

        if (parameters != null)
            for (int index = 0; index < parameters.Count; index++)
                command.Parameters.Add(parameters[index]);

            connection.Open();
            command.BeginExecuteNonQuery(new AsyncCallback(AsyncCommandCompletionCallback), command);

    }
}

static void AsyncCommandCompletionCallback(IAsyncResult result)
{
    SqlCommand cmd = null;
    try
    {
        // Get our command object from AsyncState, then call EndExecuteNonQuery.
        cmd = (SqlCommand)result.AsyncState;
        cmd.EndExecuteNonQuery(result);
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        cmd.Connection.Close();
        cmd.Dispose();
    }
}

Just had this same problem, so even though the answer is in the comments:

using (SqlConnection connection = new SqlConnection(Config.GetDbConnection() + ";Async=true;"))

causes the connection to close before the command is completed (possibly before it even really gets called as it's on another thread which probably takes a few ticks to fire up and get started).