try to write the full path of "car3.car" ;

if u interested to use c# with embedded programming use micro .netframwork and read "Apress - Expert.NET Micro Framework - Embedded programming of microcontrollers with CSharp and Microsoft Visual...

1- http://www.c-sharpcorner.com/UploadFile/myoussef /CSharpMethodsP211142005232706PM/CSharpMethodsP2.aspx

2- http://en.csharp-online.net/Interfaces_and_Abstract_Classes

3- char ch1= 'a' ; ...

hi
this simple example u can set data in combobox
for (int i = 0; i < 10; i++)
{
comboBox1.Items.Add(i);
}
comboBox1.SelectedIndex = 0;

plz follow the advice of "Atenka" and "Ramy...