how to insert current date into access database?

Private void button1_Click_1(object sender, EventArgs e)

{

this.txtinput.MaxLength = 4;

cmd = new OleDbCommand("update Login set Sales_count= IIF(IsNull(Sales_count), 0, Sales_count) + 1 where [Unique_No]=@Unique_No and [To_Date]='#"+DateTime.Now.ToString("dd/MM/yyyy")+"#'", con);

cmd.Parameters.AddWithValue("@Unique_No", txtinput.Text);

con.Open();

int n = cmd.ExecuteNonQuery();

if (n == 0)

{

MessageBox.Show("Invalid Unique No. pls try again later");// **Debugger come to this line if i insert [To_Date]='#"+DateTime.Now.ToString("dd/MM/yyyy")+"#'** // if i remove above line in code then its updating fine

}

else

{

this.DialogResult = DialogResult.OK;

}

con.Close();

}

}