public void ContraVarianceSample()
{
Child1ReturnClass CR1 = new Child1ReturnClass()
{
ChildMessage1 = "ChildMessage1"
};
contravrianceDelegate cdel = new HelperClass().Method1;
cdel(CR1);
}
public void CoVarianceSample()
{
covrianceDelegate cdel;
cdel = new HelperClass().ChildMehod1;
Child1ReturnClass CR1 = (Child1ReturnClass)cdel();
Console.WriteLine(CR1.ChildMessage1);
cdel = new HelperClass().ChildMehod2;
Child2ReturnClass CR2 = (Child2ReturnClass)cdel();
Console.WriteLine(CR2.ChildMessage2);
}