How to count total no of items in a combobox

1. Here is my code 

void bindFinancialYear()

{

string str = "SELECT FYearID, concat( YEAR(startdate),'-',YEAR(enddate)) AS FinancialYear FROM FinancialYear ORDER BY FYearID DESC";

DataTable dtcombo = objdal.GetDataTable(str);

if (dtcombo.Rows.Count > 0)

{

cbFinancialYear.DataSource = dtcombo;

cbFinancialYear.DisplayMember = "FinancialYear";

cbFinancialYear.ValueMember = "FYearID";

cbFinancialYear.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;//To make combox readonly. User can type to search

cbFinancialYear.SelectedIndex = 0;

}

}

 

2. How to show total no of items in this cbFinancialYear Combobox.

Help me.