adding default country names to dropdownlist

Ya why not. I told you already. Create a table with all the country and fetch the country name one by one and bind it in combobox.

SqlConnection sqlCon = null;
sqlCon = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
SqlCommand sqlCmd = new SqlCommand();
SqlDataAdapter adpData = null;
SqlDataReader sdrData = null;
DataSet dstData = new DataSet();

strSQL = "SELECT * FROM Country ";
sqlCmd.CommandText = strSQL;
adpData = new SqlDataAdapter(sqlCmd);
adpData.Fill(dstData);

for (int intIndx = 0; intIndx < dstData.Tables[0].Rows.Count; intIndx++)
{
 strCountryName = dstData.Tables["Event"].Rows[intIndex]["cty_txt_CountryName"].ToString();
 strCountryId = dstData.Tables["Event"].Rows[intIndex]["cty_seq_CountryCode"].ToString();
 cboCountry.Items.Add(new ListItem(strCountryName, strCountryId));
}

I am fetching country code and country name to bind in combobox.
My Combobox Id is cboCountry

thanks for the reply.

Is there any other way of getting the country names instead of hard coding the country names?

You can create a table with all country name and bind it to combobox. Or you can directly hard code the value in combobox in html segment like this:

<asp:DropDownList ID="cboCountry" Width="206" runat="server">

<asp:ListItem Value="1">United States of Americaasp:ListItem>