basic reflection usages

Could someone provide an example or suggest tutorial whereby i can use
reflection to create an object instance whose class implements certain
interface.

Here is what I have

namespace MyFoo{
internal interface IFoo{

void Run(string [] args);

}

public class Bar:Foo{

public Run(string []args ){}

}

class Test {

static void Main(string[] args)
{
stirng className="Bar";
//I want to create an instance of the class and call method Run

}
}

Thanks