C # virtual and overloaded functions

Virtual functions are added before this function declaration.
In this way, this function can be overwritten in its derived class (subclass ).

When the subclass overwrites the virtual function of the parent class, override must be explicitly added.

Usage: It can be rewritten in the subclass. When you inherit a class, you can rewrite this function in the subclass if you think that the virtual number in the parent class cannot meet your requirements.

Class
{
Public Virtual void func ()
{
Console. writeline ("funca ");
}
}

Class C:
{
Public override void func () {console. writeline ("funcc ");}
}