C Sharp 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.

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