class SimpleClass
{
int code {set;get;}
string name {set;get;}

SimpleClass(int incode, string inname)
{
    code=incode;
    name = inname;
}
}

class Form
{
     void LinkComboxToSomething()
     {
           List<SimpleClass> lst_ = new List<SimpleClass>();
           lst_.Add(0,"This is 0");
           lst_.Add(1,"This is 1");
           lst_.Add(2,"This is 2");
           comboBoxClmn.DataSource = lst_;
           comboBoxClmn.DisplayMember = "name";
           comboBoxClmn.ValueMember = "code";
           comboBoxClmn.DataPropertyName = "my_field_in_database";
     }
}