C# - Generating Top 10 After Order By via SQLite return as string line

I just started using SQLite with C#. I know how to pull a query to order the table by currency. I just don't know how to loop it for each row and write it into a list.

The table is called channel. The query will order by currency and return the top 10 rows, but only pull data from user column.

String sql = "SELECT user FROM '" + channel + "' ORDER BY currency DESC LIMIT 10";    

What I came up with so far. If anyone can help me, it will be appreciated. Still new to C# and SQLite - trying to teach myself.

    public string top10()
    {
        string[] toplist = new string[10];
        int cntr = 0;
        String sql = "SELECT user FROM '" + channel + "' ORDER BY currency DESC LIMIT 10";
        using (cmd = new SQLiteCommand(sql, myDB))
        {
            using (SQLiteDataReader r = cmd.ExecuteReader())
            {
                while (r.HasRows)
                {
                    if (r.Read())
                    {
                        toplist[cntr] = r.GetString(1);
                        cntr++;
                    }
                }
            }
        }
    }