抽象类型作为方法中的参数（.net，c＃）

Question

I have the following method which I use to fill a DropDownList-Control.

protected void LoadDropDownList(DropDownList ddl, IEnumerable<A> source)
{
    ddl.DataSource = source;
    ddl.DataBind();
}

My question is, can I make the method more abstract so that it can also take IEnumerables of type B?

Answer 1

protected void LoadDropDownList<T>(DropDownList ddl, IEnumerable<T> source) { 
    ...

See also .

Answer 2

protected void LoadDropDownList(DropDownList ddl, IEnumerable source) {
     ddl.DataSource = source;
     ddl.DataBind();
}