public void Test2()
{
// Instantiate the delegates with the methods.
DCovariant <Control> dControl = SampleControl;
DCovariant <Button> dButton = SampleButton;
// You can assign dButton to dControl
// because the DCovariant delegate is covariant.
dControl = dButton;
// Invoke the delegate.
dControl();
}
public void TestVariance()
{
DInvariant <string> dinString = () => "";
//DInvariant<object> dinObject = dinString;
DCovariant <string> dcoString = () => " ";
DCovariant <object> dcoObject = dcoString;
DContravariant <object> dcontraObject = (a) => Console.WriteLine(a);
DContravariant <string> dcontraString = dcontraObject;
DVariant <object, string> dObjectString = (a) => $"{a} ";
DVariant <object, object> dObjectObject = dObjectString;
DVariant <string, string> dStringString = dObjectString;
DVariant <string, object> dStringObject = dObjectString;
}
