public void EnableExtendingSealedClasses()
{
// Event though the host class is sealed, we can use the sum method as though it were a member
var ssc = new SomeSealedClass {
A = 6, B = 200
};
Assert.Equal(206, ssc.Sum());
}
public static int Sum(this SomeSealedClass ssc)
{
return(ssc.A + ssc.B);
}