Upcasting and downcasting in C#

Upcasting and downcasting in C#

Upcasting converts an object of a specialized type to a more general type.
Downcasting converts an object from a general type to a more specialized type.


BankAccount ba1, ba2 = new BankAccount("John", 250.0M, 0.01);
LotteryAccount la1, la2 = new LotteryAccount("Bent", 100.0M);

ba1 = la2; // upcasting - OK
// la1 = ba2; // downcasting - Illegal at compile time

// la1 = (LotteryAccount) ba2; // downcasting - Illegal at run time
la1 = (LotteryAccount) ba1; // downcasting - OK. ba1 refers to a LotteryAccount