What are virtual methods in C#?
Virtual methods in C# allow derived classes to override them, enabling polymorphism.
Can you give me an example of how to use virtual methods?
Sure! Here's a simple example:
class Animal
{
public virtual void Speak()
{
Console.WriteLine("Animal speaks");
}
}
class Dog : Animal
{
public override void Speak()
{
Console.WriteLine("Dog barks");
}
}
Animal myDog = new Dog();
myDog.Speak(); // Output: Dog barks
What happens if I don't use the virtual keyword?
If you don't use the virtual keyword, the method cannot be overridden in derived classes, and the base class implementation will be used.
Are there any performance implications of using virtual methods?
Yes, there can be a slight performance overhead due to dynamic dispatch, but it's usually negligible compared to the benefits of flexibility.
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