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// Define a single delegate that may return a Car

// or SportsCar.

public delegate Car ObtainVehicalDelegate();

public static Car GetBasicCar()

{ return new Car(); }

public static SportsCar GetSportsCar()

{ return new SportsCar(); }

static void Main(string[] args)

{

Console.WriteLine("***** Delegate Covariance *****\n");

ObtainVehicalDelegate targetA = new ObtainVehicalDelegate(GetBasicCar);

Car c = targetA();

Console.WriteLine("Obtained a {0}", c);

// Covariance allows this target assignment.

ObtainVehicalDelegate targetB = new ObtainVehicalDelegate(GetSportsCar);

SportsCar sc = (SportsCar)targetB();

Console.WriteLine("Obtained a {0}", sc);

Console.ReadLine();

}

}

Notice that the ObtainVehicalDelegate delegate type has been defined to point to methods

returning a strongly typed Car type. Given covariance, however, we can point to methods returning

derived types as well. To obtain access to the members of the derived type, simply perform an

explicit cast.