如何找到特定价值的arraylist

I have one array list:

我有一个数组列表：

public ArrayList GetExpenseTypes()
{
    ArrayList expArry = new ArrayList();

    using (SqlConnection conn = new SqlConnection(connStr))
    {
        string sql = "SELECT ID, TITLE";
        sql += " FROM EXPENSE_TYPE";
        SqlCommand cmd = new SqlCommand(sql, conn);
        SqlDataReader reader;
        try
        {
            conn.Open();
            reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                expArry.Add(new ListItem(reader["TITLE"].ToString(), reader["ID"].ToString()));
            }
            reader.Close();
        }
        catch (Exception ex)
        {

        }
        finally
        {
            conn.Close();
        }
    }
    return expArry;
}
public Arr