如何跟踪Linq-to-sql DataContext上的查询

private static Logger logger = LogManager.GetCurrentClassLogger();

logger.Debug("查询代码：{0}", query.ToString());

dataContext.Log = Console.Out;

public class QueryInterceptor : IDbCommandInterceptor
{
    public void NonQueryExecuting(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
    {
        LogQuery(command);
    }

    public void NonQueryExecuted(DbCommand command, DbCommandInterceptionContext<int> interceptionContext)
    {
    }

    public void ReaderExecuting(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
    {
        LogQuery(command);
    }

    public void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
    {
    }

    public void ScalarExecuting(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
    {
        LogQuery(command);
    }

    public void ScalarExecuted(DbCommand command, DbCommandInterceptionContext<object> interceptionContext)
    {
    }

    private void LogQuery(DbCommand command)
    {
        Debug.WriteLine(command.CommandText);
    }
}

dataContext.Interceptors.Add(new QueryInterceptor());