How to convert the datetime into a string for use in the SQL ‘ statement

<asp:label id='Label2' runat='server'>Select a culture: </asp:label>
<asp:dropdownlist id='ddlCulture' runat='server' autopostback='True'></asp:dropdownlist>
<P></P>
<asp:label id='Label3' runat='server'>DateTime in Selected Culture</asp:label>
<asp:textbox id='TextBox1' runat='server'></asp:textbox>
<p>
<asp:label id='Label1' runat='server'></asp:label>

VB.NET

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
’Put user code to initialize the page here
	If Not Page.IsPostBack Then
            		Dim cInfo As CultureInfo
	           	For Each cInfo In CultureInfo.GetCultures(CultureTypes.SpecificCultures)
			ddlCulture.Items.Add(cInfo.Name)
	                Next
	End If
End Sub

Private Sub ddlCulture_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ddlCulture.SelectedIndexChanged
	’ Get a CultureInfo object based on culture selection in dropdownlist
	Dim cInfo As CultureInfo = New CultureInfo(ddlCulture.SelectedItem.Text)
	’ Get a CultureInfo object based on Invariant culture 
	Dim cInfoNeutral As CultureInfo = New CultureInfo('')
	’ Display the datetime based on the formatting of the selected culture
       	TextBox1.Text = Convert.ToString(Now, cInfo.DateTimeFormat)
	’ Create a DateTime variable to hold the Invariant time
  	Dim dt As DateTime
	dt = Convert.ToDateTime(TextBox1.Text, cInfo.DateTimeFormat)
     	’Convert the  datetime into a string for use in the SQL statement
	Label1.Text = '... WHERE ([Date] < ’' & _
	Convert.ToString(dt, cInfoNeutral.DateTimeFormat) & '’)'
End Sub

C#

private void Page_Load(object sender, System.EventArgs e)
{
	// Put user code to initialize the page here
	if (!Page.IsPostBack )
	{
		foreach(CultureInfo cInfo in CultureInfo.GetCultures(CultureTypes.SpecificCultures))
		{
			ddlCulture.Items.Add(cInfo.Name);
		}
	}
}

private void ddlCulture_SelectedIndexChanged(object sender, System.EventArgs e)
{
	       // Get a CultureInfo object based on culture selection in dropdownlist
	       CultureInfo cInfo  = new CultureInfo(ddlCulture.SelectedItem.Text);
	       // Get a CultureInfo object based on Invariant culture 
	       CultureInfo cInfoNeutral    = new CultureInfo('');
	       // Display the datetime based on the formatting of the selected culture
	       TextBox1.Text = Convert.ToString(DateTime.Now , cInfo.DateTimeFormat);
	       // Create a DateTime variable to hold the Invariant time
	       DateTime dt ; 
	       dt = Convert.ToDateTime(TextBox1.Text, cInfo.DateTimeFormat);
	       //Convert the  datetime into a string for use in the SQL statement
	       Label1.Text = '... WHERE ([Date] < ’' +   Convert.ToString(dt, cInfoNeutral.DateTimeFormat) + '’)';
}