C# Programming/Keywords/virtual

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The keyword virtual is applied to a method declaration to indicate that the method may be overridden in a subclass. If the virtual keyword is not applied and a method is defined in a subclass with the same signature as the one in the parent class, the method in the parent class is hidden by the subclass implementation. With other words, it is only possible to have a true polymorphism of functions with this keyword.

Notice: Comparing it with Java, a method is not virtual if and only if it is final. This is the result of different design philosophies.

C# Keywords
abstract as base bool break
byte case catch char checked
class const continue decimal default
delegate do double else enum
event explicit extern false finally
fixed float for foreach
goto if implicit in int
interface internal is lock long
namespace new null object operator
out override params private protected
public readonly ref return sbyte
sealed short sizeof stackalloc
static string struct switch this
throw true try typeof uint
ulong unchecked unsafe ushort using
var virtual void volatile while
Special C# Identifiers
add alias get global partial
remove set value where yield