static void Use()
{
EditBox editbox = new EditBox();
editbox.Paint(); // error: no such method
IControl control = editbox;
control.Paint(); // calls EditBox抯 Paint implementation
}
static void UsageTwo()
{
object obj = new EditBox();
IControl control = (IControl)obj;
IDataBound dataBound = (IDataBound)obj;
}
static void UsageOne()
{
EditBox editBox = new EditBox();
IControl control = editBox;
IDataBound dataBound = editBox;
}
static void UsageTwo()
{
object obj = new EditBox();
IControl control = (IControl)obj;
IDataBound dataBound = (IDataBound)obj;
}
static void UsageOne()
{
EditBox editBox = new EditBox();
IControl control = editBox;
IDataBound dataBound = editBox;
}