C# Inheritance

Inheritance lets one class reuse and extend another. In C# you use a colon.

class A
{
    int aVariable;
    public A()
    {
    }
    public void SomeMethodA()
    {
    }
}

class B : A
{
    int bVariable;
    public B()
    {
    }
    public void SomeMethodB()
    {
    }
}

B inherits from A. In other words, B extends A. B gets aVariable and SomeMethodA, and adds bVariable and SomeMethodB.

Rules

• C# supports single inheritance. A class can inherit from only one class, but it can implement multiple interfaces.
• Constructors are not inherited.
• Inherited methods can be overridden.
• A class can inherit only from another class, not from a struct.
• A class with no explicit base class inherits from Object.