static void Main()
{
B[] data1 = new B[] { new B(), new B(), new B() };
B[] data2 = new B[] { new C(), new B(), new C() };
C[] data3 = new C[] { new C(), new C(), new C() };
List <B> list1 = new List <B>(data1);
List <C> list3 = new List <C>(data3);
ArraysVariance.ShowBs(data1);
ArraysVariance.ShowBs(data2);
ArraysVariance.ShowBs(data3);
ArraysVariance.ReplaceB(data1, new B());
ArraysVariance.ReplaceB(data1, new C());
ArraysVariance.ReplaceB(data3, new C());
try
{
ArraysVariance.ReplaceB(data3, new B());
}
catch (Exception e)
{
Console.WriteLine(e);
}
GenericsInvariance.ShowListOfBs(list1);
//GenericsInvariance.ShowListOfBs(list3);
DelegatesVariance.CreateAndShow(DelegatesVariance.makeB);
DelegatesVariance.CreateAndShow(DelegatesVariance.makeC);
DelegatesVariance.CallUseB(DelegatesVariance.PrintA, new C());
DelegatesVariance.CallUseB(DelegatesVariance.PrintB, new C());
//DelegatesVariance.CallUseB(DelegatesVariance.PrintC, new B());
}
static void Main()
{
B[] data1 = new B[] { new B(), new B(), new B() };
B[] data2 = new B[] { new C(), new B(), new C() };
C[] data3 = new C[] { new C(), new C(), new C() };
List <B> list1 = new List <B>(data1);
// List<B> list2 = new List<C>(data3); // List<C> is not a List<B>
List <C> list3 = new List <C>(data3);
ArraysVariance.ShowBs(data1);
ArraysVariance.ShowBs(data2);
ArraysVariance.ShowBs(data3); // C[] is a B[] (for reading)
Console.WriteLine();
ArraysVariance.ReplaceB(data1, new B());
ArraysVariance.ReplaceB(data1, new C());
ArraysVariance.ReplaceB(data3, new C());
try
{
ArraysVariance.ReplaceB(data3, new B()); // C[] is not a B[] for writing
}
catch (Exception e)
{
Console.WriteLine(e);
}
Console.WriteLine();
GenericsInvariance.ShowListOfBs(list1);
// GenericsInvariance.ShowListOfBs(list3); // List<C> is not a List<B>
Console.WriteLine();
// DelegatesVariance.CreateAndShow(DelegatesVariance.makeA);
DelegatesVariance.CreateAndShow(DelegatesVariance.makeB);
DelegatesVariance.CreateAndShow(DelegatesVariance.makeC);
Console.WriteLine();
DelegatesVariance.CallConsumeB(DelegatesVariance.PrintA, new C());
DelegatesVariance.CallConsumeB(DelegatesVariance.PrintB, new C());
//DelegatesVariance.CallConsumeB(DelegatesVariance.PrintC, new B());
}
